Fig. 2
From: Anal extraskeletal osteosarcoma in a man: a case report and review of the literature
Microscopic findings of the tumor stained with hematoxylin and eosin. a Normal glands of the anal mucosa with a spindle cell neoplasm in the lamina propria and submucosa (magnification, × 100). b and d Osteoid formation between spindle cells (magnification, × 200). c Pleomorphic and atypical spindle cell neoplasm with osteoid formation (magnification, × 200 and magnification, x 400)