Lipomas are not expected to disappear and recur. The most likely tumour to do this is a mast cell tumour. Note that fine needle aspiration does not 'diagnose' a lipoma, it simply finds fat. The ASSUMPTION is that if the only cells were taken from the tumour, and the tumour is only composed of fat, then the diagnosis is lipoma. BUT, if the fat was collected from adjacent the tumour and no cells were taken from the tumour itself, a misdiagnosis can happen.
_________________ _______________ Dr Ken Wyatt BSc BVMS FANZCVS Specialist Veterinary Oncologist Perth Veterinary Oncology
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