is a rare condition where the heart remains on the left side.

is a rare immune-related nerve disorder causing uneven weakness and numbness.

is a progressive brain disease causing dementia, movement changes, and hallucinations.

is a rare genetic condition affecting sex development in some children.

is a rare genetic condition affecting sexual development in some male babies.

is a rare genetic condition affecting testosterone production and sexual development.

is a rare genetic condition affecting male sexual development and fertility.

is a rare testicular tumor that makes hormones and may cause symptoms.

is a rare noncancerous cerebellar growth that can affect balance and coordination.

is an inherited condition with very high, early-life cancer risk.

is a hereditary condition from TP53 gene changes, causing multiple early cancers.

is an inherited cancer syndrome that greatly raises lifetime cancer risk.

is a rare, noninfectious heart valve inflammation often linked to lupus.

is a contagious parasitic infestation causing itching and visible nits.

is a chronic skin disease causing itchy, scaly bumps from amyloid deposits.

is a skin condition causing itchy, inflamed, sometimes patchy rashes.

is a rare skin disorder causing waxy bumps and thickened skin.

is a harmless skin condition causing tiny, shiny bumps.

is an inflammatory scalp condition that can cause permanent hair loss.

is an inflammatory condition causing itchy, flat, purple skin bumps.

is a rare autoimmune skin disorder causing itchy bumps and blisters.

is a chronic skin condition causing dark, patchy discoloration.

is a very rare condition with signs and symptoms that vary.

is a rare inherited disorder causing high blood pressure, sometimes low potassium.