Case 179. Protothecosis (66 y-o M)

　 　 　 　
　 Biopsy from an irregular infiltrative nodule on the dorsum of the hand of a farmer who cultivates Japanese oranges 　
　 　 　 　

　

 　 A wood splinter is noted in the dermis, adjacent to the granulomatous cutaneous lesion. Prototheca is widely seen in the tree, soil, gut of the fish, etc.