dermatologic disorders
Onychomycosis
Introduction
Onychomycosis is fungal infection of the nail plate, nail bed, or both. The nails typically are deformed and discolored white or yellow. Diagnosis is by appearance, wet mount, culture, polymerase chain reaction, or a combination. Treatment, when indicated, is with oralterbinafineoritraconazole. (See also Overview of Nail Disorders .) About 10% (range 2 to 14%) of the population has onychomycosis. Risk factors for onychomycosis include Tinea Pedis (Athlete's Foot) None Preexisting nail dystrophy (eg, in patients with Psoriasis ) Older age Male sex Exposure to someone with tinea pedis or onychomycosis (eg, a family member or through public bathing) Peripheral Arterial Disease or Immunocompromise Toenails are 10 times more commonly infected than fingernails. About 60 to 80% of cases are caused by Overview of Dermatophytoses (eg, 