is a rare neurologic disorder affecting peripheral nerves and deep brain structures.

is a rare inherited joint disorder causing progressive stiffness and enlarged joints.

is a rare multiple sclerosis type with steady worsening and relapses.

is an inherited retinal disorder causing vision loss from impaired retinol transport.

is a rare muscle disease causing weakness in shoulders, arms, and legs.

is a rare genetic disorder causing progressive hearing loss and cardiomyopathy.

is a rare genetic disorder affecting bone growth, height, and learning.

is a rare brain disorder affecting balance, movement, eye control, and thinking.

is a rare brain disorder causing movement, balance, and thinking problems.

is a brain disease causing stiffness, slow movement, balance, and eye problems.

is a rare brain disorder causing worsening movement, speech, and language problems.

is a rare brain disorder causing freezing of walking and slowed movement.

causes lifelong, symmetric red scaly patches with skin thickening (hyperkeratosis), often childhood-onset.

is a usually benign pituitary tumor that makes too much prolactin.

is a usually noncancerous pituitary tumor that makes too much prolactin.

is when pelvic organs drop and bulge into the vagina.

is when the tear gland slips out of its normal position.

is when the urethral lining slips outward through the opening.

is a rare inherited disorder affecting collagen breakdown, skin, and development.

is a rare, usually benign hair follicle growth, often on the scalp.

is advanced diabetic retinal disease with abnormal vessel growth causing vision loss.

is a rare, benign fast-growing lump caused by myofibroblast overgrowth.

is a kidney disease causing inflammation and damage in the filtering units.

is a noncancerous breast change with extra cell growth and cysts.