is a group of diseases that damage nerves controlling movement.

is nerve damage causing muscle weakness, cramps, and movement problems.

are repeated, often rhythmic movements that usually begin in early childhood.

is a rare lung condition causing enlarged airways and repeated infections.

is an infection or condition affecting the mouth, causing pain or sores.

is a movement disorder that affects how a person moves.

is a rare genetic condition causing developmental delay and multiple congenital anomalies.

is a rare genetic condition affecting development, learning, and body systems.

is a rare genetic condition affecting development, learning, and body systems.

is a rare blood vessel disorder that reduces brain blood flow.

is a rare genetic syndrome affecting brain vessels, growth, and sexual development.

is a rare brain vessel disorder causing reduced blood flow and strokes.

is a rare disorder causing narrowed brain arteries and swallowing problems.

is a very rare genetic syndrome that causes multiple birth differences.

is a rare inherited disorder affecting sugar processing and many body systems.

is a rare inherited disorder affecting sugar processing, especially in the liver.

is a contagious viral infection that usually causes rash and flu-like symptoms.

is a rare inherited eye disorder that can cause progressive vision loss.

is an inherited condition causing colon polyps and higher colorectal cancer risk.

is a rare inherited mitochondrial disorder causing leg stiffness, weakness, and neuropathy.

is a genetic condition causing developmental delay, seizures, microcephaly, and short stature.

is a rare immune system cancer involving abnormal antibodies.

is a rare B-cell disorder that makes abnormal antibody heavy chains.

is an inherited kidney disease that slowly worsens kidney function over time.