Dupuytren’s Contracture

Dupuytren’s contracture is a flexion contracture of the hand in which the fingers bend towards the palm and cannot be fully extended. It is caused by a palmar fibromatosis. The disease is an inherited proliferative connective tissue disorder that involves the...

Behr Syndrome

Behr syndrome is characterized by early-onset optic atrophy along with neurological features, including ataxia, spasticity, and intellectual disability. Other signs and symptoms may be present and vary from person to person. This condition is caused by mutations in...

Autoimmune Polyendocrine Syndrome Type 1

Autoimmune polyendocrine syndrome type 1 (APS-1) is an inherited autoimmune condition that affects many of the body’s organs. Symptoms often begin in childhood and may include mucocutaneous candidiasis, hypoparathyroidism, and Addison disease. Affected...

Atransferrinemia

Atransferrinemia (also called familial hypotransferrinemia) is an autosomal recessive metabolic disorder in which there is an absence of transferrin, a plasma protein that transports iron through the blood. It is characterized by anemia and hemosiderosis in the heart...

Apparent Mineralocorticoid Excess Syndrome

Apparent mineralocorticoid excess syndrome (AME) is an autosomal recessive disorder causing hypertension (high blood pressure) and hypokalemia (abnormally low levels of potassium). It results from mutations in the HSD11B2 gene, which encodes the kidney isozyme of...