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April 1972

Pitted Keratolysis and Dermatophilus congolensis

Author Affiliations

USN, Washington, DC

From the Geographic Pathology Branch, Armed Forces Institute of Pathology, Washington, DC.

Arch Dermatol. 1972;105(4):584-586. doi:10.1001/archderm.1972.01620070056021

Pitted keratolysis is a multifocal superficial erosion of the stratum corneum, usually limited to the soles of the feet. A causative agent has been described previously, but its identity is unclear. While studying a lesion of pitted keratolysis, we found an actinomycete with the morphologic appearance of Dermatophilus congolensis, the cause of dermatophilosis in animals. From our study of this case and from a review of the literature we believe that D congolensis was a causal factor in this lesion and that it was probably the causative agent of some cases of pitted keratolysis described previously.