Green nails, also known as chloronychia or green nail syndrome, are characterized by green discoloration of the nail plate (greenish-yellow, greenish-brown, greenish-black), proximal chronic non-tender paronychia, and distolateral onycholysis. The cause is Pseudomonas aeruginosa infection of the nail plate in persons whose hands are constantly exposed to water, soaps, and detergents or are subj...

We describe three cases of retronychia; a chronic case where total nail avulsion had to be performed since the inflammation persisted after proximal nail avulsion and the first two cases of retronychia on an early clinical stage successfully treated with partial nail avulsion. We also describe the first two cases of retronychia appearing after a chemical matricectomy, occurring on the same pati...

Trachyonychia or rough nails, may present as an idiopathic disorder of the nails or it can be associated with other dermatological conditions. The dystrophic nail findings seen in trachyonychia are characterized by brittle, thin nails, with excessive longitudinal ridging. The most common histopathologic features associated with trachyonychia are spongiosis and exocytosis of inflammatory cells i...

One study analyzed all visits to a nail consultation practice over a sixmonth period, revealing forty-four patients who had been prescribed the B-vitamin biotin. Of these, thirty-five who took daily supplementation were subjectively evaluated. Twenty-two of thirty-five (63 percent) showed clinical improvement and thirteen (37 percent) reported no change in their condition. The results of this r...