is a benign skin growth near the anus that may irritate.

is a rare, usually noncancerous growth in the urethra.

is a very rare bone disorder with abnormal collagen and fragile bones.

is a rare noncancerous liver mass caused by inflammation and scar-like tissue.

is a rare liver cancer that usually affects adolescents and young adults.

is a fatty change in spinal tissue that may tether the cord.

is a usually noncancerous growth made of fibrous or connective tissue.

is a long-term condition causing widespread pain, fatigue, and sleep problems.

is a rare inherited kidney disease caused by fibronectin buildup.

is a rare birth defect where skin and spinal cord remain connected.

is a rare, noncancerous bone and tissue growth in fingers or toes.

is a rare cancer that starts in fibrous connective tissue.

is a rare bone cancer that starts in connective tissue cells.

is a rare bone cancer with fibrous tissue and bone-forming cells.

is a benign breast condition causing firm, sometimes tender, lumpy tissue.

is a rare genetic disorder affecting the brain, blood vessels, and tissues.

is a rare bone disorder where fibrous tissue weakens normal bone.

is a bone disorder where normal bone is replaced by weak tissue.

is a rare disorder affecting bones, skin color, and hormone-producing glands.

is a rare soft tissue cancer that often starts near joints.

is a rare birth condition affecting lower leg and finger development.

is a rare birth condition affecting the fibula and hand-foot development.

is inflammation of a small fluid-filled sac beside the outer knee.

is a rare birth condition causing extra toes, feet, and fibula.