Pathology in Practice.

In collaboration with the American College of Veterinary Pathologists.

Intrahistiocytic Storage of Clofazimine Crystals in a Cat.

A 13-year-old castrated male Maine coon cat with a 5-year history of atypical mycobacteriosis was euthanized and submitted for necropsy. The cat had been kept in clinical remission since diagnosis using a combination of the antimycobacterial drug clofazimine and additional multimodal antimicrobial therapy. Grossly, tissues were diffusely discolored red-brown to yellow.