Destructive deformation of the digits with auto-amputation: a review of pseudo-ainhum. 
Pseudo-ainhum is an auto-amputation of the digits.  Although extremely rare, it is a traumatic and painful experience that can be alleviated with early recognition and intervention.  The scientific literature is filled with reports of this interesting but unfortunate phenomenon.  To date, a firm causative aetiology has not yet been established.  Although reports on this phenomenon have attempted to further our understanding of pseudo-ainhum, a clear understanding has been complicated by the interchangeable use of terms describing this auto-amputation.  In this review, we discuss the current understanding, diagnostic criteria, and management of pseudo-ainhum.  Furthermore, the nomenclature of pseudo-ainhum is clarified.  Ideally, this will allow for more efficient exploration of pseudo-ainhum, its causes, and therapeutic approaches.