is a rare inherited anemia caused by abnormal red blood cell membranes.

is a rare inherited anemia from a red blood cell enzyme defect.

is a rare eye condition affecting the cornea and sometimes vision.

is a rare inflammatory skin condition causing itchy, flat-topped purple bumps.

is a rare autoimmune skin condition causing rashes, sun sensitivity, and sores.

is an uncommon group of conditions causing partial or complete hearing loss.

is an uncommon anemia caused by low levels of essential nutrients.

is a group of uncommon brain diseases causing progressive cognitive decline.

is a rare birth defect that develops during early embryonic growth.

is a rare developmental disorder that also affects connective tissue.

is a rare birth condition affecting development, skin, and mucous membranes.

is an uncommon group of conditions causing high blood sugar.

is a rare autoimmune form of diabetes causing lifelong insulin dependence.

is a less common form of diabetes causing high blood sugar.

is a rare tumor in the digestive system.

is a rare disorder that slows or disrupts normal intestinal movement.

is a rare disorder causing adrenal Cushing syndrome and related hormone problems.

is a rare condition sometimes associated with autism and developmental differences.

is a rare genetic condition affecting tooth development and sometimes bones.

is a rare disorder in which glaucoma is a major feature.

is a rare genetic disorder linked to dangerous reactions to anesthesia.

is a rare disorder marked by sudden muscle jerks (myoclonus).

is a rare condition that affects the teeth and sometimes other parts.

is a rare condition affecting facial development, breathing, and feeding.