Pseudo-ainhum has been a term used in connection with certain hereditary and nonhereditary diseases in which annular constriction of digits occur, and treatment may be with surgery or intralesional injections of corticosteroids, as in ainhum

Ainhum

Ainhum is a painful constriction of the base of the fifth toe frequently followed by bilateral spontaneous amputation a few years later. The disease occurs predominantly in black Africans and their descendants...

. It is rarely seen in the United States but often discussed in the international medical literature.