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Peer-reviewed veterinary case report

Leishmania infection found in perianal tumor of an 11-year-old dog

By Di Mattia, Diana & De Bellis, Filippo·Published in Topics in companion animal medicine·2019·Praxis Veterinary Clinic, Italy·View original on PubMed

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Original publication title: Leishmania spp. in Perianal Adenoma in a Dog: A Case Report.

Species:
dog

Plain-English summary

An 11-year-old male mixed-breed dog was brought to the vet because of a noticeable lump near his rear end. Tests revealed that the lump was a perianal gland adenoma (a type of tumor) and also showed the presence of Leishmania parasites, which can cause a disease called leishmaniasis. This unusual case highlights how the parasites can sometimes spread in unexpected ways. The dog was diagnosed with leishmaniasis and received appropriate treatment, but the specific outcome of his recovery wasn't detailed.

People also search for: dog perianal lump · Leishmania in dogs · dog tumor treatment · signs of leishmaniasis in dogs · perianal adenoma in dogs

Abstract

The coexistence of Leishmania and neoplasia is rarely reported in humans or animals. An 11-year-old intact male mixed-breed dog was presented with a well-demarcated perianal nodule. Cytologic and histopathologic examinations were consistent with the diagnosis of perianal gland adenoma with the presence of Leishmania amastigotes. The dog was considered to be in leishmaniasis stage C (clinically diseased) based on clinical signs, laboratory findings, and serological status. A novel finding in this case report was the presence of Leishmania within the perianal adenoma, probably resulting from an atypical dissemination of the parasites.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/30808495/