Disease A-Z Library

Rx Musculoskeletal Conditions

Browse plain-English disease and condition guides, including symptoms, causes, diagnosis, treatment options, prevention, and when to seek medical care.

126 articlesUpdated medical education library

Diseases A-Z

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Cone Dystrophy

Cone dystrophy is a rare eye disease where the cone cells in the retina slowly stop working properly. Cone cells are the light-sensing cells that help...

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Collagen VI-Related Dystrophy

Collagen VI-related dystrophy is a group of rare genetic diseases that damage the muscles and the supporting tissues around them. In this condition, the body has...

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Collagen 6-Related Myopathy

Collagen 6-related myopathy (often written as collagen VI-related myopathy) is a rare inherited muscle disease. It happens when there is a change (mutation) in the genes...

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Myoseptumitis

Myoseptumitis is a medical word that means inflammation of the myoseptum, which is the thin wall of tissue inside a muscle that separates small bundles of...

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Myoseptum Inflammation

Myoseptum inflammation is a thin sheet of strong connective tissue that lies between blocks of muscle fibers. It acts like a wall or partition inside the...

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Peroneal Muscular Atrophy

Peroneal muscular atrophy is an older name for Charcot–Marie–Tooth disease (CMT). It is a group of inherited (genetic) nerve diseases that slowly damage the peripheral nerves...

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Charcot-Marie-Tooth Neuropathy

Charcot-Marie-Tooth neuropathy is a group of inherited nerve diseases that slowly damage the long nerves in the arms and legs. These nerves are called “peripheral nerves.”...

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Charcot-Marie-Tooth Muscular Atrophy

Charcot-Marie-Tooth muscular atrophy (usually called Charcot-Marie-Tooth disease, or CMT) is a group of genetic nerve diseases that slowly damage the long nerves in the legs, feet,...

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Ulnar Dimelia

Ulnar dimelia is a very rare birth problem of the arm and hand. In this condition the radius bone on the thumb side is missing, and...

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Mirror Hand

Mirror hand, also called ulnar dimelia, is an extremely rare birth difference where the bones on the “little-finger side” of the forearm (the ulna and the...

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Mesoaxial Polydactyly

Mesoaxial polydactyly of the fingers means there is an extra finger in the middle part of the hand, usually next to the index, middle, or ring...

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Mesoaxial Polydactyly

Mesoaxial polydactyly (also called central polydactyly) means that a person is born with an extra finger or toe in the middle part of the hand or...

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