Nov 12, 2024 · Down syndrome is a genetic condition caused when an unusual cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes …

Aug 2, 2022 · Sjogren's (SHOW-grins) syndrome is a disorder of your immune system identified by its two most common symptoms — dry eyes and a dry mouth. The condition often …

Aug 25, 2022 · Ehlers-Danlos syndrome is a group of inherited disorders that affect your connective tissues — primarily your skin, joints and blood vessel walls. Connective tissue is a …

Overview Bardet-Biedl (BAR-day, BEE-dul) syndrome, also called BBS, is a rare condition caused by changes in genes. BBS can affect almost any part of the body. Starting in early childhood, …

Jun 7, 2024 · Guillain-Barre syndrome is rare, and the exact cause is not known. But two-thirds of people have symptoms of an infection in the six weeks before Guillain-Barre symptoms begin.

Jun 5, 2025 · Today, clinicians and researchers refer to this rare condition as either Parsonage-Turner syndrome (PTS) or neuralgic amyotrophy. To mark the 75th anniversary of the original …

Jun 7, 2023 · Cushing syndrome happens when the body has too much of the hormone cortisol for a long time. This can result from the body making too much cortisol, or from taking …

Apr 30, 2025 · Stevens-Johnson syndrome (SJS) is a rare, serious disorder of the skin and mucous membranes. It's usually a reaction to medication that starts with flu-like symptoms, …

Dec 13, 2024 · Also known as Willis-Ekbom disease, restless legs syndrome usually occurs in the evening or at night when a person has been sitting or lying down. People describe it as …

Dec 2, 2025 · Lynch syndrome is a genetic condition that raises the risk of many types of cancer, especially colon cancer and endometrial cancer. It's an inherited condition, which means it's …