Synonyms: None

Clinical Presentation (Fig. 14A):

■ Solitary patches and subtle red plaques covered by fine scales

■ Coral-red fluorescence when exposed to Wood's light

■ Intertriginous regions

■ Elderly persons of both sexes, especially those with diabetes mellitus

■ Recurrences are common

Histopathology (Figs. 14B and C):

■ Sparse superficial perivascular infiltrate of lymphocytes

■ Slight orthokeratosis

■ Blue-staining organisms in the form of delicate rods and filaments in the cornified layer

■ Gram stain shows delicate gram-positive rods and filaments in the cornified layer

Clinicopathologic Correlation:

Differential Diagnosis:


Tinea Corporis

Pseudohyphae in the cornified

Hyphae in the lowermost part of the

layer oriented both vertically and

cornified layer, oriented horizontally

horizontally on all levels of the

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