the atypical cutaneous tumor of a 9-year - old mixed breed female dog was examined . 
 the tumor was well - demarcated and histologically composed of a trichoblastic 
 area , tricholemmal area and apocrine glandular area . 
 neoplastic cells in trichoblastic area and tricholemmal area had pas - positive granules in the cytoplasm and 
 were positive for pan - cytokeratin , cytokeratin 5/6 , 14 and 19 and p63 . 
 neoplastic cells in trichoblastic area were also positive for cytokeratin 15 and cd34 . 
 neoplastic cells in apocrine glandular area were positive for pan - cytokeratin and cytokeratin 7 , 18 and 19 . 
 myoepithelial cell proliferation with 
 osteocartilaginous metaplasia was observed in this area . 
 since neoplastic cells showed multiphenotypic differentiation for hair follicles and apocrine glands , 
 the present case was diagnosed as a cutaneous mixed tumor .