The difficulties encountered in attempting to delineate the accurate diagnosis in nail dyscrasias are well known. Where the glabrous skin is involved in a cu- taneous syndrome, the nail condition is assumed to be part of the same disorder. Practically all textbook descriptions are based on this assumption except in fungous infections where the fungi may be found on microscopic examination or where a positive culture has been obtained. Naturally, local causes as contacts, growths and injuries, as well as congenital defects present clinical aberrations.