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Use the A-Z list to browse more than 6,000 health-related topics in our library. Clicking on a term opens the definition and, in most cases, links to more information.
Topic Index
- + S Phase Fraction
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- S Phase Fraction
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A measure for determining if a tumor is growing slowly (low result) or at a fast rate (high result). It is the percentage of cells that are replicating their DNA, an indication that they are preparing to split (multiply).
More Information on S Phase Fraction: Cancer Basics
- + SA Block
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- SA Block
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"SA Block" is more commonly referred to as "Sinoatrial Block" in the medical community.
Sinoatrial Block
Also Known As: "Sinus Node Block"
An abnormal heart rhythm caused by a delayed or blocked transmission of electrical impulses through the sinoatrial node of the heart.
More Information on Sinoatrial Block: Arrhythmia
- + SA Node
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- SA Node
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"SA Node" is more commonly referred to as "Sinoatrial Node" in the medical community.
Sinoatrial Node
Also Known As: "Sinus Node"
The heart's natural pacemaker. Located in the upper-right chamber of the heart (right atrium), it sends signals that tell the heart's lower chambers to contract and pump.
More Information on Sinoatrial Node: Arrhythmia
- + SAARDs
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- SAARDs
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"SAARDs" is more commonly referred to as "Slow Acting Antirheumatic Drugs" in the medical community.
Slow Acting Antirheumatic Drugs
A type of disease-modifying antirheumatic drugs (DMARDs). They are used to alter the course of the rheumatoid arthritis and prevent joint and cartilage destruction. They work more slowly than nonsteroidal anti-inflammatory drugs (NSAIDs).
More Information on Slow Acting Antirheumatic Drugs: Arthritis
- + Saccharin
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- Saccharin
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Also Known As: "Acid Saccharin, Sodium Saccharin, Calcium Saccharin"
An artificial sweetener that is between 300 to 700 times sweeter than sucrose. Because it is not digested or absorbed, saccharin does not contribute calories to a person's diet.
More Information on Saccharin: Carbs & Sugars
- + Sacral Nerve Root Cysts
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- Sacral Nerve Root Cysts
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"Sacral Nerve Root Cysts" is more commonly referred to as "Tarlov Cysts" in the medical community.
Tarlov Cysts
Also Known As: "Perineural Cysts"
Fluid-filled sacs that most often affect nerve roots in the sacrum. These cysts compress nerve roots and cause lower back pain, sciatica, urinary incontinence and sexual dysfunction. Women are at much higher risk than men.
More Information on Tarlov Cysts: Back, Neck & Shoulder Pain
- + Sacral Nerve Stimulation
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- Sacral Nerve Stimulation
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A procedure used to reduce fecal incontinence caused by nerve damage. A device surgically implanted in the abdomen delivers electrical impulses to the sacral nerve that controls bowel and anal sphincter functioning.
More Information on Sacral Nerve Stimulation: Digestive Treatments
- + Sacral Nerve Stimulator
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- Sacral Nerve Stimulator
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A device that is implanted under the skin in the abdomen. It is used to regain bowel control after nerve damage.
More Information on Sacral Nerve Stimulator: Digestive Treatments
- + Sacral Region
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- Sacral Region
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Curved triangular bone at the base of the spine composed of five vertebrae that are fused together to form a bone mass. The bones are connected to the last vertebrae (the coccyx) and the hipbone on each side.
More Information on Sacral Region: Back, Neck & Shoulder Pain
- + Sacroiliac Belts
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- Sacroiliac Belts
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"Sacroiliac Belts" is more commonly referred to as "Back Braces" in the medical community.
Back Braces
Also Known As: "Lumbosacral Belts, Raney Flexion Jackets, Lumbar Braces, Williams Braces, Hyperextension Braces, Chair Back Braces, Molded Jackets"
Devices used to help stabilize the lower back. There are many types, including various belts, corsets, braces and jackets.
More Information on Back Braces: Head & Spine Injury
- + Sacroiliac Joint
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- Sacroiliac Joint
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The juncture in the lower area of the spinal cord between the sacrum (curved bone at the base of the spine) and the ilium (part of the pelvis where the hip bones connect).
More Information on Sacroiliac Joint: Back, Neck & Shoulder Pain
- + Sacroiliac Joint Dysfunction
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- Sacroiliac Joint Dysfunction
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Also Known As: "Sacroiliac Joint Inflammation, Sacroiliac Joint Syndrome"
Inflammation and dysfunction of one or both sacroiliac joints that connect the base of the spine (sacrum) to the pelvic bone. It can cause lower back pain and/or buttocks pain.
More Information on Sacroiliac Joint Dysfunction: Back, Neck & Shoulder Pain
- + Sacroiliac Joint Inflammation
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- Sacroiliac Joint Inflammation
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Also Known As: "Sacroiliac Joint Syndrome, Sacroiliac Joint Dysfunction"
Inflammation and dysfunction of one or both sacroiliac joints that connect the base of the spine (sacrum) to the pelvic bone. It can cause lower back pain and/or buttocks pain.
More Information on Sacroiliac Joint Inflammation: Back, Neck & Shoulder Pain
- + Sacroiliac Joint Syndrome
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- Sacroiliac Joint Syndrome
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Also Known As: "Sacroiliac Joint Dysfunction, Sacroiliac Joint Inflammation"
Inflammation and dysfunction of one or both sacroiliac joints that connect the base of the spine (sacrum) to the pelvic bone. It can cause lower back pain and/or buttocks pain.
More Information on Sacroiliac Joint Syndrome: Back, Neck & Shoulder Pain
- + Sacroiliitis
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- Sacroiliitis
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Also Known As: "Sacroiliac Joint Syndrome, Sacroiliac Joint Dysfunction, Sacroiliac Joint Inflammation"
Inflammation and dysfunction of one or both sacroiliac joints that connect the base of the spine (sacrum) to the pelvic bone. It can cause lower back pain and/or buttocks pain.
More Information on Sacroiliitis: Back, Neck & Shoulder Pain
- + Sacrum
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- Sacrum
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Also Known As: "Sacral Region"
Curved triangular bone at the base of the spine composed of five vertebrae that are fused together to form a bone mass. The bones are connected to the last vertebrae (the coccyx) and the hipbone on each side.
More Information on Sacrum: Back, Neck & Shoulder Pain
- + SAD
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- SAD
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"SAD" is more commonly referred to as "Seasonal Affective Disorder" in the medical community.
Seasonal Affective Disorder
Depression that occurs on a seasonal basis, most often in winter. The cause is unknown but may be related to body temperature, hormone regulation and ambient light. Treatments may include antidepressants and light therapy.
More Information on Seasonal Affective Disorder: Depression & Bipolar
- + Sadism
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- Sadism
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Deriving pleasure from acts of cruelty.
More Information on Sadism: Impulse Control Disorders
- + SADS
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- SADS
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"SADS" is more commonly referred to as "Sudden Arrhythmia Death Syndrome" in the medical community.
Sudden Arrhythmia Death Syndrome
Any abnormal heart rhythms (arrhythmia) that increases the risk of sudden cardiac death. Long QT Syndrome is the most common example.
More Information on Sudden Arrhythmia Death Syndrome: Arrhythmia
- + SAECG
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- SAECG
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"SAECG" is more commonly referred to as "Signal Averaged EKG" in the medical community.
Signal Averaged EKG
Also Known As: "SAEKG, Signal Averaged Electrocardiogram"
A type of EKG. It uses a computer to filter signals called "late potentials" to allow for a more detailed analysis of the heart's electrical function. May be used to assess the potential danger of ventricular arrhythmias (abnormal heart rhythms).
More Information on Signal Averaged EKG: Heart Imaging & Rhythm Tests
- + SAEKG
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- SAEKG
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"SAEKG" is more commonly referred to as "Signal Averaged EKG" in the medical community.
Signal Averaged EKG
Also Known As: "Signal Averaged Electrocardiogram, SAECG"
A type of EKG. It uses a computer to filter signals called "late potentials" to allow for a more detailed analysis of the heart's electrical function. May be used to assess the potential danger of ventricular arrhythmias (abnormal heart rhythms).
More Information on Signal Averaged EKG: Heart Imaging & Rhythm Tests
- + Safe Handling of Chemotherapy Drugs
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- Safe Handling of Chemotherapy Drugs
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"Safe Handling of Chemotherapy Drugs" is more commonly referred to as "Chemotherapy Drug Handling" in the medical community.
Chemotherapy Drug Handling
Chemotherapy medications require special handling to ensure the safety of patients and others who may come into contact with the drugs.
More Information on Chemotherapy Drug Handling: Cancer Drug & Medication
- + Safe Tables Our Priority
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- Safe Tables Our Priority
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Also Known As: "STOP"
A national organization that works to prevent illness and death associated with foodborne illness. It works with government agencies and industry to encourage practices and policies that promote safe food.
- + Saint Vitus Dance
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- Saint Vitus Dance
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"Saint Vitus Dance" is more commonly referred to as "Sydenham Chorea" in the medical community.
Sydenham Chorea
Also Known As: "Sydenham Disease"
A complication of rheumatic fever characterized by uncontrolled repetitive, jerky movements (chorea) that can last for several months.
More Information on Sydenham Chorea: Movement Disorders
- + Salicylate
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- Salicylate
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A salt of salicylic acid that is present in some foods, beverages, cosmetics and medications, including aspirin (acetylsalicylic acid). Medications containing this salt may be referred to as salicylates.
- + Salicylate Allergy
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- Salicylate Allergy
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An increased sensitivity to salicylate (salt of salicylic acid) that may result an allergic reaction. Salicylate is present in some foods, beverages, cosmetics and medications, including aspirin (acetylsalicylic acid).
More Information on Salicylate Allergy: Cosmetic, Chemical & Metal
- + Salicylate Sensitivity
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- Salicylate Sensitivity
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Also Known As: "Salicylate Allergy"
An increased sensitivity to salicylate (salt of salicylic acid) that may result an allergic reaction. Salicylate is present in some foods, beverages, cosmetics and medications, including aspirin (acetylsalicylic acid).
More Information on Salicylate Sensitivity: Cosmetic, Chemical & Metal
- + Saliva
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- Saliva
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A fluid composed of water, protein and salts present in the mouth that begins digestion and assists swallowing.
More Information on Saliva: Oral Health Basics
- + Salivary Amylase
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- Salivary Amylase
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An enzyme produced by the salivary glands that begins carbohydrate digestion in the mouth. This process continues in the stomach after the food and saliva have been swallowed.
- + Salivary Gland Disease
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- Salivary Gland Disease
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Diseases or disorders of the salivary glands (found in and around the mouth and throat that secrete saliva, initiate digestion and help protect teeth from decay). This includes infection, stones and other problems.
More Information on Salivary Gland Disease: Mouth & Tongue Disorders
- + Salivary Gland Disorders
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- Salivary Gland Disorders
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Also Known As: "Salivary Gland Disease"
Diseases or disorders of the salivary glands (found in and around the mouth and throat that secrete saliva, initiate digestion and help protect teeth from decay). This includes infection, stones and other problems.
More Information on Salivary Gland Disorders: Mouth & Tongue Disorders
- + Salivary Gland Infection
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- Salivary Gland Infection
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Also Known As: "Sialadenitis"
A bacterial infection due to blockage of ducts in the salivary gland through which saliva flows to the mouth. It occurs in the elderly and people debilitated by illness, recovering from surgery or undergoing cancer treatment.
More Information on Salivary Gland Infection: Oral Infections
- + Salivary Gland Stones
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- Salivary Gland Stones
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Also Known As: "Sialoliths"
Stones made up of layers of calcified organic matter that cause painful swelling of the salivary gland. They must be removed surgically or by using a finger to squeeze the stone from the gland into the mouth.
More Information on Salivary Gland Stones: Mouth & Tongue Disorders
- + Salivary Glands
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- Salivary Glands
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Glands found in and around the mouth and throat that secrete saliva, initiate digestion and help protect teeth from decay. They include the parotid, submandibular and sublingual glands.
More Information on Salivary Glands: Oral Health Basics
- + Salmonella
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- Salmonella
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A bacterium often associated with food poisoning due to eating contaminated meat. It may cause intestinal infection and diarrhea.
More Information on Salmonella: Gastroenteritis & Food Illness
- + Salmonella Infection
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- Salmonella Infection
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Also Known As: "Salmonella Poisoning, Salmonellosis"
An intestinal infection caused by the salmonella bacterium. It is often associated with food poisoning due to eating contaminated meat, poultry, eggs or unpasteurized milk or contact with infected animals.
More Information on Salmonella Infection: Gastroenteritis & Food Illness
- + Salmonella Poisoning
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- Salmonella Poisoning
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Also Known As: "Salmonellosis"
An intestinal infection caused by the salmonella bacterium. It is often associated with food poisoning due to eating contaminated meat, poultry, eggs or unpasteurized milk or contact with infected animals.
More Information on Salmonella Poisoning: Gastroenteritis & Food Illness
- + Salmonella Typhi Infection
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- Salmonella Typhi Infection
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"Salmonella Typhi Infection" is more commonly referred to as "Typhoid Fever" in the medical community.
Typhoid Fever
Also Known As: "Typhoid, Enteric Fever"
A foodborne illness typically contracted during travel to developing countries. Salmonella typhi bacteria travel throughout the body via the bloodstream. Symptoms include diarrhea and a rash on the abdomen and chest.
More Information on Typhoid Fever: Tropical Disease
- + Salmonellosis
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- Salmonellosis
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Also Known As: "Salmonella Poisoning"
An intestinal infection caused by the salmonella bacterium. It is often associated with food poisoning due to eating contaminated meat, poultry, eggs or unpasteurized milk or contact with infected animals.
More Information on Salmonellosis: Gastroenteritis & Food Illness
- + Salpingectomy
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- Salpingectomy
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Also Known As: "Bilateral Salpingectomy"
Surgical removal of one or both fallopian tubes (bilateral). When performed at the same time as oophorectomy (removal of the ovaries), it is called salpingo oophorectomy.
More Information on Salpingectomy: Uterine & Ovarian Health
- + Salpingectomy Oophorectomy
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- Salpingectomy Oophorectomy
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"Salpingectomy Oophorectomy" is more commonly referred to as "Oophorectomy" in the medical community.
Oophorectomy
Also Known As: "Bilateral Salpingo Oophorectomy, Ovary Removal, Unilateral Oophorectomy, Ovariectomy, Bilateral Oophorectomy, Bilateral Ovariectomy, Salpingo Oophorectomy"
Surgical removal of one (unilateral) or both (bilateral) ovaries. It is used to treat cancers, cysts or uterine disorders. It may be performed alone of in combination with removal of the uterus (hysterectomy) or fallopian tubes (salpingectomy).
More Information on Oophorectomy: Uterine & Ovarian Health
- + Salpingitis
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- Salpingitis
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A type of pelvic inflammatory disease in which an infection rises from the vagina or cervix into the fallopian tubes.
More Information on Salpingitis: Uterine & Ovarian Health
- + Salpingo Oophorectomy
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- Salpingo Oophorectomy
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"Salpingo Oophorectomy" is more commonly referred to as "Oophorectomy" in the medical community.
Oophorectomy
Also Known As: "Bilateral Salpingo Oophorectomy, Ovary Removal, Unilateral Oophorectomy, Ovariectomy, Bilateral Oophorectomy, Salpingectomy Oophorectomy, Bilateral Ovariectomy"
Surgical removal of one (unilateral) or both (bilateral) ovaries. It is used to treat cancers, cysts or uterine disorders. It may be performed alone of in combination with removal of the uterus (hysterectomy) or fallopian tubes (salpingectomy).
More Information on Oophorectomy: Uterine & Ovarian Health
- + Salpingotomy
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- Salpingotomy
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A surgical procedure to open a fallopian tube
More Information on Salpingotomy: Uterine & Ovarian Health
- + Salt
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- Salt
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Also Known As: "Sodium"
Salt (sodium chloride) is a naturally occurring crystal compound. Although sodium is a mineral that is needed by the body, some research has linked large intakes of salt to high blood pressure.
More Information on Salt: Additives & Seasonings
- + Salt & the Heart
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- Salt & the Heart
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Salt (sodium chloride) is a naturally occurring crystal compound. Although sodium is a mineral that is needed by the body, some research has linked large intakes of salt to high blood pressure.
More Information on Salt & the Heart: Heart Diet & Fitness
- + San Joaquin Valley Fever
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- San Joaquin Valley Fever
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"San Joaquin Valley Fever" is more commonly referred to as "Valley Fever" in the medical community.
Valley Fever
Also Known As: "Coccidioidomycosis, Coccidioides Immitis Infection"
Illness caused by breathing in a fungus in soil that becomes airborne. It occurs in the Southwest and southern California and typically causes fever, chest pain and coughing. The illness typically disappears on its own.
More Information on Valley Fever: Infectious Disease Basics
- + Sandhoff Disease
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- Sandhoff Disease
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A genetic lipid storage disorder resulting in the progressive deterioration of the central nervous system. It is caused by a deficiency of the enzyme hexosaminidase, which causes an accumulation of lipids in the body.
More Information on Sandhoff Disease: Pediatric Brain & Nerve
- + Santavuori Haltia Disease
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- Santavuori Haltia Disease
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Also Known As: "Infantile Neuronal Ceroid Lipofuscinosis, Infantile NCL"
A type of neuronal ceroid lipofuscinosis, a progressive neurological disease that begins in childhood. It usually begins by age 2 and progresses rapidly, becoming fatal by age 5.
More Information on Santavuori Haltia Disease: Pediatric Brain & Nerve
- + Saphenous Vein
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- Saphenous Vein
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A vein, located in the leg, that is commonly used to perform coronary artery bypass grafts.
- + Saponins
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- Saponins
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Phytochemicals found in many plant foods and oils. They may help reduce cholesterol absorption and fight cancer. They dissolve in water to form a soapy froth and some are potentially poisonous.
- + Sapoviruses
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- Sapoviruses
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A family of viruses associated with mild gastroenteritis in children under the age of 5 years.
More Information on Sapoviruses: Gastroenteritis & Food Illness
- + Sarcoidosis
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- Sarcoidosis
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An inflammatory disease in which multiple granulomas (small growths) form in the lungs, lymph nodes and other organs. Among the many problems associated with the disease is joint inflammation (arthritis). It is usually chronic, but can be temporary.
More Information on Sarcoidosis: Fibromyalgia & Pain Disorders
- + Sarcoma
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- Sarcoma
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A form of cancer that begins within connective tissue, including the bones, cartilage, fat, tendons or muscle.
More Information on Sarcoma: Cancer Basics
- + Sarcoma Breast Leukemia Adrenal Gland Syndrome
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- Sarcoma Breast Leukemia Adrenal Gland Syndrome
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"Sarcoma Breast Leukemia Adrenal Gland Syndrome" is more commonly referred to as "Li Fraumeni Syndrome" in the medical community.
Li Fraumeni Syndrome
Also Known As: "LFS, SBLA, SBLA Syndrome"
A rare genetic predisposition to develop a specific set of cancers, often abbreviated as SBLA: Sarcoma, breast cancer, leukemia and adrenal gland cancer. It is caused by a genetic mutation (change) in the p53 tumor suppressor gene.
More Information on Li Fraumeni Syndrome: Cancer Risk Factors
- + Sarcoptes Scabei Infestation
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- Sarcoptes Scabei Infestation
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A contagious and itchy skin disease caused by a very small species of mite. The mites burrow under the skin and deposit their eggs, forming a burrow that resembles a pencil mark. Scabies is spread by direct contact with infected individuals.
More Information on Sarcoptes Scabei Infestation: Skin Related Infections
- + SARS
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- SARS
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Also Known As: "SARS Disease, Severe Acute Respiratory Syndrome, SARS Virus"
A serious form of pneumonia first described in 2003 that results in acute respiratory distress and can be fatal. It can spread far and very rapidly -- the first outbreak began in Asia and infected thousands throughout the world in just six weeks.
More Information on SARS: Pneumonia & Lung Infection
- + SARS Disease
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- SARS Disease
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Also Known As: "Severe Acute Respiratory Syndrome, SARS Virus"
A serious form of pneumonia first described in 2003 that results in acute respiratory distress and can be fatal. It can spread far and very rapidly -- the first outbreak began in Asia and infected thousands throughout the world in just six weeks.
More Information on SARS Disease: Pneumonia & Lung Infection
- + SARS Virus
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- SARS Virus
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Also Known As: "Severe Acute Respiratory Syndrome, SARS Disease"
A serious form of pneumonia first described in 2003 that results in acute respiratory distress and can be fatal. It can spread far and very rapidly -- the first outbreak began in Asia and infected thousands throughout the world in just six weeks.
More Information on SARS Virus: Pneumonia & Lung Infection
- + Satiation
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- Satiation
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Also Known As: "Satiety"
Feeling of satisfaction and fullness after eating.
- + Satiety
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- Satiety
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Feeling of satisfaction and fullness after eating.
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- + Saturated Fat
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- Saturated Fat
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A type of fat that is solid at room temperature. It raises total cholesterol and LDL (or "bad") cholesterol levels in the bloodstream, which can dramatically increase the risk for heart disease.
More Information on Saturated Fat: Fats & Oils
- + Saw Palmetto
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- Saw Palmetto
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A plant used in herbal remedies to relieve symptoms associated with an enlarged prostate gland.
More Information on Saw Palmetto: Herbs & Supplements
- + SBLA
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- SBLA
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"SBLA" is more commonly referred to as "Li Fraumeni Syndrome" in the medical community.
Li Fraumeni Syndrome
Also Known As: "LFS, SBLA Syndrome, Sarcoma Breast Leukemia Adrenal Gland Syndrome"
A rare genetic predisposition to develop a specific set of cancers, often abbreviated as SBLA: Sarcoma, breast cancer, leukemia and adrenal gland cancer. It is caused by a genetic mutation (change) in the p53 tumor suppressor gene.
More Information on Li Fraumeni Syndrome: Cancer Risk Factors
- + SBLA Syndrome
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- SBLA Syndrome
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"SBLA Syndrome" is more commonly referred to as "Li Fraumeni Syndrome" in the medical community.
Li Fraumeni Syndrome
Also Known As: "LFS, Sarcoma Breast Leukemia Adrenal Gland Syndrome, SBLA"
A rare genetic predisposition to develop a specific set of cancers, often abbreviated as SBLA: Sarcoma, breast cancer, leukemia and adrenal gland cancer. It is caused by a genetic mutation (change) in the p53 tumor suppressor gene.
More Information on Li Fraumeni Syndrome: Cancer Risk Factors
- + Scabies
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- Scabies
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Also Known As: "Sarcoptes Scabei Infestation"
A contagious and itchy skin disease caused by a very small species of mite. The mites burrow under the skin and deposit their eggs, forming a burrow that resembles a pencil mark. Scabies is spread by direct contact with infected individuals.
More Information on Scabies: Skin Related Infections
- + Scaffolding Device
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- Scaffolding Device
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"Scaffolding Device" is more commonly referred to as "Stenting" in the medical community.
Stenting
Also Known As: "Coronary Stenting"
A procedure in which a wire mesh tube is inserted through a catheter and placed in an artery to hold it open. Stenting is usually performed right after a balloon angioplasty, while the catheter is still in place.
More Information on Stenting: Catheter Tests & Procedures
- + Scalded Mouth Syndrome
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- Scalded Mouth Syndrome
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"Scalded Mouth Syndrome" is more commonly referred to as "Burning Mouth Syndrome" in the medical community.
Burning Mouth Syndrome
Also Known As: "BMS, Stomatodynia"
A condition that causes a burning or scalding sensation in the mouth, particularly on the lips and tongue, and generally with no visible signs of irritation.
More Information on Burning Mouth Syndrome: Mouth & Tongue Disorders
- + Scaling
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- Scaling
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Removal of calculus (tartar), plaque and stain that attach to the tooth surfaces, especially below the gum line along the root surface. It is the most conservative form of treatment for gum disease and is often performed with root planing.
More Information on Scaling: Oral Health Basics
- + Scalp Ringworm
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- Scalp Ringworm
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Also Known As: "Tinea Capitis, Tinea Tonsurans"
Fungal infection of the scalp. It may begin as a small sore resembling a pimple before becoming patchy, flaky or scaly. It may cause some hair to fall out or break into stubbles. The infection site may become swollen, tender and red.
More Information on Scalp Ringworm: Skin Related Infections
- + Scaphocephaly
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- Scaphocephaly
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A congenital malformation of the skull that causes it to be long and narrow. It is frequently accompanied by mental retardation.
More Information on Scaphocephaly: Pediatric Brain & Nerve
- + Scarlatina
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- Scarlatina
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Also Known As: "Scarlet Fever Disease"
A bacterial infection that causes a bright red rash, particularly in children.
More Information on Scarlatina: Skin Related Infections
- + Scarlet Fever
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- Scarlet Fever
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Also Known As: "Scarlatina, Scarlet Fever Disease"
A bacterial infection that causes a bright red rash, particularly in children.
More Information on Scarlet Fever: Skin Related Infections
- + Scarlet Fever Disease
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- Scarlet Fever Disease
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Also Known As: "Scarlatina"
A bacterial infection that causes a bright red rash, particularly in children.
More Information on Scarlet Fever Disease: Skin Related Infections
- + Scars
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- Scars
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Marks left on the skin by the healing of injured tissue. They are composed of fibrous tissue that is often raised and thickened, and may be pink to purple in color before fading to white over time.
More Information on Scars: Skin Growths
- + Scatter Photocoagulation
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- Scatter Photocoagulation
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"Scatter Photocoagulation" is more commonly referred to as "Photocoagulation" in the medical community.
Photocoagulation
Also Known As: "Panretinal Photocoagulation, Focal Photocoagulation"
A primary treatment for diabetic retinopathy. A strong beam of light (laser) seals off bleeding blood vessels in the eye and burns away extra blood vessels that should not have grown there.
More Information on Photocoagulation: Eye Conditions
- + Schamberg Disease
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- Schamberg Disease
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One of several disorders known collectively as progressive pigmentary purpura. It results in a rusty brown skin discoloration marked with tiny red dots. Effects are usually cosmetic and do not pose danger.
More Information on Schamberg Disease: Skin Discoloration
- + Schatzki's Ring
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- Schatzki's Ring
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"Schatzki's Ring" is more commonly referred to as "Lower Esophageal Ring" in the medical community.
Lower Esophageal Ring
An abnormal ring of tissue in the lower esophagus that may cause partial blockage.
More Information on Lower Esophageal Ring: GERD & Heartburn
- + Schema
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- Schema
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A mental structure that represents an aspect of the world and helps people organize current knowledge while providing a framework for future understanding. Examples include stereotypes, scripts and archetypes.
- + Schilder's Disease
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- Schilder's Disease
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Also Known As: "Myelinoclastic Diffuse Sclerosis, Diffuse Sclerosis"
A progressive demyelinating disorder that is a variant of multiple sclerosis. It usually begins in childhood. Symptoms may include dementia, aphasia, seizures and personality changes. The course of the disease varies.
More Information on Schilder's Disease: Pediatric Brain & Nerve
- + Schiller Test
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- Schiller Test
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A test in which an iodine stain is applied to cervical tissue. Normal tissue becomes stained a brownish color while abnormal cells will remain an unstained white or yellow. While not a direct test for cancer cells, it is used to guide biopsies.
More Information on Schiller Test: Brain & Nerve Cancer
- + Schilling Test
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- Schilling Test
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A vitamin B-12 absorption test. Patients receive a drink and injection of vitamin B-12. Later, urine samples are collected and evaluated for traces of the vitamin. Low levels indicate a problem absorbing vitamin B-12.
More Information on Schilling Test: Digestive Lab Tests
- + Schistorrhachis
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- Schistorrhachis
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A congenital defect where one or more vertebrae are malformed. It may be identified by amniocentesis.
More Information on Schistorrhachis: Birth & Genetic Disorders
- + Schistosoma Infection
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- Schistosoma Infection
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Also Known As: "Bilharzia"
An infection caused by one of the five species of parasite known as Schistosoma. Transmission occurs through contact with contaminated water.
More Information on Schistosoma Infection: Parasitic Disease
- + Schistosomiasis
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