Ainhum ("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 undelrlying fracture or autoamputation
History and etymology
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
- palmoplantar keratoderma
- pachonychia congenita
- Vohwinkel disease
- 1. Hunt M, Glucksman EE. Ainhum presenting to the accident and emergency department. Arch Emerg Med. 1994;10 (4): 324-7. Free text at pubmed - Pubmed citation
- 2. Daccarett M, Espinosa G, Rahimi F et-al. Ainhum (dactylolysis spontanea): a radiological survey of 6000 patients. J Foot Ankle Surg. 2003;41 (6): 372-8. Pubmed citation
- 3. Shtofmakher G, Kaufman MA, Cohen R et-al. Autoamputation of the fifth digit: ainhum (dactylolysis spontanea). BMJ Case Rep. 2014;2014 (may20 1): . doi:10.1136/bcr-2014-205021 - Pubmed citation