Case 172. Sporotrichosis (68 y-o M)

　 　 　 　
　
Biopsy from painless, red-colored crusted papules on the chest wall
 　
　 　 　 　

　

 　 The squamous epithelium shows marked downward proliferation (pseudocarcinomatous hyperplasia) in association with ulceration, marked inflammatory reaction and foreign body giant cell formation (HE, low power).