Disseminated histiocytic sarcoma in 2 FeLV-positive cats in Brazil

Gabriela Hartmann, Éryca C. Lamego, Yasmin Daoualibi, Joanna V. Z, Maria Vitória G. Sanches, Marcele Bettim Bandinelli, Saulo Petinatti Pavarini, Luciana SonneDepartment of Veterinary Pathology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul

Journal of Veterinary Diagnostic Investigation

Published online on June 18, 2026

Abstract

Journal of Veterinary Diagnostic Investigation, Ahead of Print.
Histiocytic sarcomas (HSs) are uncommon malignant neoplasms in cats, typically affecting older animals and not previously associated with feline leukemia virus (FeLV). Here, we describe 2 cases of disseminated HS in young FeLV-positive domestic shorthair ...