Primary cutaneous actinomycosis of the extremities: a report from Japan.

A 30-year-old man with cerebral palsy showed cutaneous actinomycosis of the extremities. The diagnosis was confirmed by the histopathologic finding of "sulfur granules." Actinomyces israelii was not cultured as is often the case with actinomycosis. The disease was successfully treated with piperacillin and then with minocycline. This is, to the author's knowledge, the first report in English on actinomycosis from Japan, and the rarity of its occurrence in the extremities is documented.