Cytological and histopathological diagnosis. I. canine mammary tumours*

Out of 65 cases studied in canines, eight were mammary tumours. This included one each simple tubular adenocarcinoma, complex adenocarcinoma, cystic papillary adenoma and benign mixed mammary tumours and two each squamous cell carcinomas and papillary adenocarcinomas. Cytologically, various adenocarcinomas had similar properties. The neoplastic cells in smears were round to caudate, exhibiting anisocytosis, spherical to oval nuclei, anisokaryosis, abnormal nuclear/nucleolar shapes, mutliple nucleoli, coarse chromatin, foamy cytoplasm, multinucleation and mitotic figures. In squamous cell carcinoma, predominance of squamous cells and in complex adenocarcinoma spindle cells were seen.