Ainhum - Nail and Distal Digit
Ainhum occurs in 4 progressive stages, which may take years to fully develop. It begins with the formation of the sulcus, next edema results from the deepening of the sulcus, followed by autoamputation, and then, in the final stage, necrosis completes the amputation. The cause of ainhum is unknown, although many etiologies have been suggested, including impaired blood supply to the little toe.
Ainhum should be distinguished from pseudoainhum, which is congenital or associated with other acquired diseases, including psoriasis, disorders of keratinization, connective tissue diseases, and trauma, among others.
L94.6 – Ainhum
38528001 – Ainhum
Differential Diagnosis & Pitfalls