Cutaneous mast cell tumour in a dog

Abstract

A 9-year-old male Dachshund dog was presented to the local multi-speciality hospital, Chennai with the history of presence of multiple masses on the scrotal area for the past 6 months for surgical removal. Blood samples, peripheral blood smears and fine needle aspiration smears of the mass were collected and sent to the Centralised Clinical Laboratory, Madras Veterinary College, Chennai for laboratory diagnosis. Haematological values were found to be within normal limits except leukocytosis with neutrophilia of left shift. Serum biochemical studies also showed no abnormal changes in parameters pertaining to liver functions and kidney functions. Cytological examination revealed predominant population of discrete round to oval cells having small to moderate amounts of pale basophilic cytoplasm with varying numbers of characteristic purple colored (metachromatic) granules. Based on the present laboratory findings, the lump was confirmed as mast cell tumour.