The owner decided to wait and see for the next 2 months. The subcutaneousskin tumour, 5 cm x 5 cm x 3 cm, on the right side of the abdomen grew fast by doubling its size in the 2 months. So the owner decided on surgery. "It looks like a cancerous tumour as the growth rate is rapid, doubling in size in one month!", I advised sending to the Asia Veterinary Diagnostics laboratory for histopahology.
Mast cell tumour, high grade (Ref 1), Patniak grade III (Ref 2, 3).
Neoplastic cells had extended to the lateral margin. (A 2-cm margin was made during excision).
Prognosis - Grade III mast cell tumours with a high mitotic rate (>5/10hpf) and/or prominent anisokaryosis and/or giant cell formation (high grade) have a poor outcome and have a median suvival time of under 2 months. Enlarged lymph nodes should be examined to check for metastasis.