Malignant melanoma in pleural effusion in a 14-year-old cat

Journal of Feline Medicine and Surgery
Michelle A Morges, Karen Zaks

Abstract

A 14-year-old female cat presented with signs of respiratory distress. Pleural fluid was found on radiographic assessment. Cytologic evaluation of the fluid revealed malignant melanocytosis. The cat had a previous history of a recurrent malignant melanoma near the base of the right ear. Due to declining clinical condition, the cat was euthanized. Cutaneous malignant melanomas (or melanosarcomas) are uncommon neoplasms in cats, and knowledge is limited. As far as the authors are aware, there are no previous reports in the veterinary literature of malignant melanocytes being identified in pleural effusion in cats, as they have in dogs. This report suggests that, despite conflicting information in the literature regarding the clinical behavior of cutaneous melanomas in cats, these tumors are capable of recurrence and metastasis. Aggressive treatment may be necessary even, as in this case, if the tumor is well differentiated on histopathology.

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Citations

Mar 15, 2015·Surgical Oncology Clinics of North America·Kendra J Feeney, Michael J Mastrangelo
Jan 16, 2016·Journal of Feline Medicine and Surgery·Gabriel ChamelCatherine Ibisch
Dec 20, 2015·Journal of Feline Medicine and Surgery·Luminita SarbuPhilip J Bergman
Feb 23, 2021·Veterinary Clinical Pathology·Erica CordaJennifer S Thomas

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Methods Mentioned

BETA
biopsy
biopsies

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