Penile fibrosarcoma tumor in a bull

Abstract

This is a report of a penile fibrosarcoma in a two-year-old crossbred Holstein bull. The ulcerated tumormass with dimensions of 7 × 9 × 6.5 cm, was enveloped the glans and body of the penis. It had a white-graycolor at cross section appearance. There was no metastatic evidence of regional lymph node enlargement.Histopathologically, elongated spindle-shaped cells arranged densely in the interwoven pattern had a low rateof mitosis with oddly-shaped nuclei and pleomorphism. Immunohistochemically, the neoplastic cells werepositive for vimentin and S100, but negative for α-smooth muscle actin, desmin, C-KIT and GFAP.