Skin inflammatory (nontumor)
Infectious disorders
Fungi - Onychomycosis

Author: Nat Pernick, M.D. (see Authors page)

Revised: 18 October 2018, last major update July 2011

Copyright: (c) 2002-2018,, Inc.

PubMed Search: Fungi - Onychomycosis [title]

Cite this page: Pernick, N. Fungi - Onychomycosis. website. Accessed December 12th, 2018.
Definition / general
  • Spread of fungi to nail apparatus, caused by Trichophyton rubrum and Trichophyton mentagrophytes; also Candida albicans and Scopulariopis brevicaulis
  • Often multiple fungal species
  • Common in patients with diabetes; associated with NOT washing feet daily (Int J Nurs Stud 2011;48:1101)
  • Proposed clinical classification: distal and lateral subungual (beneath the nail), superficial, endonyx (diffuse milky-white discolouration of affected nail but no nail bed hyperkeratosis and no onycholysis), proximal subungual, mixed, totally dystrophic and secondary onychomycosis (J Am Acad Dermatol 2011;65:1219)
Clinical images

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Toenail infections