Image Quiz: Dermatology—A bulldog with erythematous plaques

Jul 22, 2010

This 8-year-old bulldog has a history of slowly progressive, minimally pruritic erythematous crusted plaques on its trunk and ventrum.

An aspirate was obtained for cytologic examination, and the results are shown below.

What is your diagnosis?

a) Mast cell tumor

b) Lymphoma

c) Plasmacytoma

d) Histiocytoma