The effects of onychogryphosis. Photograph: Elord @wikidoc.org
"Onychogryphosis" - Abnormal thickening, hardening, and curving of the nails that occurs mainly in elderly people. Onychogryphosis may be associated with fungal infection or poor circulation.
"onychogryphosis". British Medical Association (2007). Illustrated Medical Dictionary. 2nd ed. London: Dorling Kindersley (DK). p414.