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Case 6:
History:
Multiple irregular masses in the mammary chain of a mixed
breed bitch aged 7 years
Firm knobby irregular swelling of the left inguinal lymph node.
Gross pathology:
Excisional biopsy of one mass showed variably sized small cystic areas
mixed with dense tan to white fibrous areas in the mass.
Non encapsulated irregular epithelial
neoplastic mass, with areas of inflammation. The shaded area shows
normal adjacent mammary tissue for comparison.
Enlarged hyperchromatic epithelial
cells with nuclear pleomorphism, but a low mitotic rate. Cells are
arranged in papillary and acinar patterns. Based on these features
alone, it would be difficult to assess biologic behaviour (benign
or malignant)
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