Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «S»:
Selective deficiency of IgA
Selective deficiency of IgA is the most common immune deficiency disorder. Persons with this disorder have low or absent levels of a blood protein called immunoglobulin A.
IgA deficiency is usually inherited, which means it is passed down through families. However, cases of drug-induced IgA ...
Selective mutism is a condition in which a child who can speak well stops speaking, usually in school or social settings.
The cause of selective mutism is unknown. Most experts believe that children with the condition inherit a tendency to be anxious and inhibited. Most children with this co...
Selenium in diet
Selenium is an essential trace mineral. Small amounts of selenium are good for your health.
Selenium has a variety of functions. It helps make special proteins, called antioxidant enzymes, which play a role in preventing cell damage. Some medical information suggests that selenium may help...
Self catheterization - female
You will use a catheter (tube) to drain urine from your bladder. You may need a catheter because you have urinary incontinence (leakage), urinary retention (not being able to urinate), surgery that made a catheter necessary, or another health problem.
What to Expect at Home
Urine will drain through...
Self catheterization - male
You will use a catheter (tube) to drain urine from your bladder. You may need a catheter because you have urinary incontinence (leakage), urinary retention (not being able to urinate), prostate problems, or surgery that made it necessary.
What to Expect at Home
Urine will drain through your cathete...
Semen analysis is a test to measure the amount and quality of a man's semen and sperm. Semen is the thick, white, sperm-containing fluid released during ejaculation.
The test is sometimes called a sperm count.
How the Test is Performed
You will need to provide a semen sample. Your health care provi...
Sensitivity analysis determines the effectiveness of antibiotics against microorganisms such as bacteria that have been isolated from cultures.
Sensitivity analysis may be performed along with:
Clean catch urine culture or catheterized specimen urine culture
Sensorimotor polyneuropathy causes a decreased ability to move or feel (sensation) due to nerve damage.
Neuropathy means a disease of, or damage to nerves. When it occurs outside of the brain or spinal cord, it is called a peripheral neuropathy. Mononeuropathy means one nerve is involved. Po...
Sensorineural deafness is decreased hearing or hearing loss that occurs from damage to the inner ear, the nerve that runs from the ear to the brain (auditory nerve), or the brain.
For more information, see the article on hearing loss.
Sensorineural deafness can be present at birth (congenita...
Separation anxiety is a developmental stage during which the child experiences anxiety when separated from the primary caregiver (usually the mother).
As infants develop, they experience various emotions, usually in a predictable order. Before 8 months, infants are so new to the world that t...
Sepsis is a severe illness in which the bloodstream is overwhelmed by bacteria.
Sepsis is caused by a bacterial infection that can begin anywhere in the body. Common places where an infection might start include:
The bowel (usually seen with peritonitis)
The kidneys (upper urinary tract inf...
A septal hematoma is a bruise or bleeding within the nasal septum. The septum of the nose separates the two nostrils.
A broken nose or any soft tissue injury to the area may cause a septal hematoma. This can occur more often in children because their septums are thicker and have a more flexi...
Septic arthritis is inflammation of a joint due to a bacterial infection other than gonorrhea (joint infection due to gonorrhea has different symptoms).
Septic arthritis develops when bacteria spread through the bloodstream to a joint. It may also occur when the joint is directly infected wi...
Septic shock is a serious condition that occurs when an overwhelming infection leads to life-threatening low blood pressure.
Acute respiratory distress syndrome
Disseminated intravascular coagulation
Septic shock occurs mos...
Septicemia is the presence of bacteria in the blood (bacteremia) and is often associated with severe infections.
Septicemia is a serious, life-threatening infection that gets worse very quickly. It can arise from infections throughout the body, including infections in the lungs, abdomen, and...