Disseminated cutaneous mast cell tumor in a South American coati (Nasua nasua).

Authors

Renata Dalcol Mazaro, Gabriela Hartmann, Diego Cardoso, Tereza Cristina Da Silva, Bruno Cogliati, Glaucia Denise Kommers, Rafael Almeida Fighera

Published in

Veterinary research communications. Volume 50. Issue 5. Jul 31, 2026. Epub Jul 31, 2026.

Abstract

Cutaneous mast cell tumors have been described in all species of domestic mammals. However, information about these tumors in free-ranging and captive wild mammals is limited, with no reports in procyonids. This report aims to describe a case of disseminated cutaneous mast cell tumor in a captive South American coati (Nasua nasua). The animal was submitted to euthanasia and necropsy. On external examination, multiple papules, nodules, and plaques were distributed over the body surface. On cut section, they were soft and white. Histologically, they were composed of dense sheets of neoplastic cells interspersed with a delicate collagenous stroma. Cells were round and had a finely granular cytoplasm. Mast cell tumors were diagnosed based on histological features, positive staining with toluidine blue, and immunohistochemical labelling for the KIT protein. To the best of our knowledge, this is the first report of disseminated cutaneous mast cell tumor in this animal species.

PMID:
42536293
Bibliographic data and abstract were imported from PubMed on 31 Jul 2026.

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