<unk> , also known as avascular necrosis of the metacarpal head, is an extremely rare condition characterized by temporary or permanent loss of blood supply to the metacarpal head of the metacarpal bone, resulting in loss of bone tissue. The five metacarpal bones are long bones located between the carpals of the wrist and phalanges of the fingers. Collectively, the metacarpals are referred to as the "metacarpus." In the case of<unk> , some but not all metacarpal heads are affected. Onset of this disease can be attributed to steroid usage, systemic lupus erythematosus, or trauma. In some cases, it is randomly-occurring.<unk>  can be diagnosed through medical screening or blood testing. Physicians may also diagnose<unk>  by taking a history of the patient's symptoms. Some treatment options include medication, surgery, or therapy.
Dieterich's disease
Milroy's disease
Mortimer's disease
Kimura's disease
Kienböck's disease
Tornwaldt's disease
Majocchi's disease
Hartnup disease