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Ainhum, also known as dactylolysis spontanea, is a rare cutaneous condition in which a hyperkeratotic band partially or totally encircles a digit. The constriction thins the underlying bone, which is then prone to fracture. Some cases result in autoamputation.

Some have suggested that the disease is much more prevalent in those with melanotic skin (e.g. Africans) 2.

  • marked soft tissue constriction around a digit
  • possible underlying fracture or autoamputation

The word "ainhum" is thought to derive from the naga dialect in Burma, meaning "to saw" or "to cut".

"Pseudoainhum" can occur in other disorders, including

Article information

rID: 33810
Synonyms or Alternate Spellings:
  • Dactylolysis spontanea
  • Dactylolysis essentialis
  • Ainhoum
  • Ombanja

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Cases and figures

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