Learn about this rare disease that affects brain cells. The disease can make it hard to speak, move and think.
Disease
Cushing syndrome
High levels of the hormone cortisol in your body cause this endocrine disorder. Learn about symptoms, causes and treatment.
Disease
Cyclic vomiting syndrome
This condition often starts in childhood and is marked by spells of vomiting several times an hour over a period of hours or days.
Disease
Delayed sleep phase
Learn more about this sleep condition that causes a delay in usual sleep patterns.
Disease
Desmoplastic small round cell tumors
These rare, aggressive cancers most often form in the abdomen. Learn about DSRCT treatments, including surgery, chemotherapy and radiation therapy.
Disease
Deviated septum
Learn how uneven nostrils can sometimes cause stuffiness, nosebleeds or other symptoms.
Disease
DiGeorge syndrome (22q11.2 deletion syndrome)
This condition is due to missing part of chromosome 22. It may cause heart issues, thyroid problems, cleft palate, lower immunity and other health problems.
Disease
Dislocated shoulder
This shoulder injury, which occurs in the body's most mobile joint, causes the upper arm bone to pop out of its socket.
Disease
Down syndrome
In this genetic condition, an unusual cell division results in extra genetic material from chromosome 21. This causes delays in growth and development.
Disease
Dressler syndrome
Learn about the symptoms and treatment of this condition that involves swelling and irritation of the sac around the heart after damage to the heart muscle.
Disease
Drug addiction (substance use disorder)
Drug addiction affects your brain and behavior to the point where you can't control your use of legal or illegal drugs, even when you know they cause harm.
Disease
Dry skin
Learn more about the causes of and self-care tips for a common flaky skin condition that tends to be temporary or seasonal but may become a lifelong problem.