Cutaneous mycosis

Dermatophytes include Trichophyton, Epidermophyton, Microsporum.- Branching septae hyphae visible on KOH preparation with blue fungal stain.- Associated with pruritus.

Tinea capitis: Occurs on head, scalp. Associated with lymphadenopathy, alopecia, scaling.Tinea corporis: Occurs on torso. Characterized by erythematous scaling rings ("ringworm") and central clearing. Can be acquired from contact with an infected cat or dog.Tinea cruris: Occurs in inguinal area. Often does not show the central clearing seen in tinea corporis.Tinea pedis: Interdigital (most common), moccasin distribution, vesciular type.Tinea unguinum: Onchomycosis; occurs on nails.