What Is Zollinger-Ellison Syndrome? Zollinger–Ellison syndrome (ZES) is a disease in which tumors cause the stomach to produce too much acid, resulting in peptic Read More

Overview Agnosia is characterized by an inability to recognize and identify objects and/or persons. Symptoms may vary, according to the area of Read More

Aging, Sexuality and Physical Changes Many people want and need to be close to others as they grow older. For some, this Read More

Aggressive Mastocytosis Mastocytosis is a rare disorder characterized by abnormal accumulations of mast cells in the skin, bone marrow, and internal organs Read More

Age-Related Macular Degeneration Age-related macular degeneration (AMD) is a disease that causes the gradual loss of sight due to blurring or loss Read More

Acanthocytosis Acanthocytes (from the Greek word acantha, which means thorn), or spur cells, are spiculated red cells with a few projections of Read More

What is Medium Chain Acyl-CoA Dehydrogenase Deficiency? Medium chain acyl-CoA dehydrogenase (MCAD) deficiency is a treatable inherited disease in which the body Read More

What Is Zika Virus? The Zika virus, first identified in Uganda in 1947, is transmitted by Aedes mosquitoes, the same type of Read More

What is absent menstruation? Absent menstruation, or amenorrhea, is the absence of menstrual bleeding. It happens when a girl hasn’t had her Read More

Overview Agenesis of corpus callosum (ACC) is a rare disorder that is present at birth (congenital). It is characterized by a partial Read More

Absence Defect of Limbs, Scalp and Skull The physical abnormalities in the patients who have this disorder vary greatly among affected individuals. Read More

A1AT Deficiency Alpha-1 antitrypsin deficiency is an inherited disorder that may cause lung disease and liver disease. The signs and symptoms of Read More