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Rare Diseases

Also known as an orphan disease, a rare disease is an illness that typically affects less than 200,000 people in the U.S. and doesn't always get adequate research funding.

All articles in Rare Diseases

Hemophilia B: Symptoms & Treatments

Hemophilia B is a hereditary bleeding disorder caused by a lack of blood clotting factor IX. People with hemophilia experience frequent bruising and prolonged bleeding.
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Acute Disseminated Encephalomyelitis

This article will review the symptoms, causes, and management of acute disseminated encephalomyelitis. Symptoms of the preceding illness include headache, fever, nausea, vomiting, or altered mental status, followed by the condition-specific symptoms of difficulty controlling limbs or eyes, trouble swallowing, speaking, or urinating, vision loss, spastic movements of the limbs, seizures, bleeding in the brain, as well as possible depression and psychosis.
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