Pitiose subcutânea felina : relato de caso

Abstract

Pythiosis in felines is a rare disease associated with Pythium insidiosum. The aim of this report is to describe the macroscopic, histopathological and molecular characteristics of P. insidiosum infection in a young cat with a focally invasive mass in the subcutaneous. The feline, since was young, presented an increase of volume near the rectal region. The cat died after a surgical procedure. The necropsy was performed and samples were collected for histopathological examination. Microscopically the skin lesion was characterized by granulomatous dermatitis, panniculitis and myositis associated with negative images, similar to hyphae, with irregular ramifications and rare septations, which were associated with P. insidiosum through immunohistochemistry and PCR. Therefore, pythiosis should be considered in the differential diagnosis of subcutaneous tissue disorders in felines.