Filaroides hirthi hyperinfection associated with adrenal cortical carcinoma in a dog.

An adrenal cortical carcinoma, verminous pneumonia and hepatic parasitic granulomas were found at necropsy in a 10-year-old castrated male Dalmatian. Filaroides hirthi hyperinfection due to endogenous cortisol production was diagnosed on the basis of clinical and clinicopathological evidence of hyperadrenocorticism, pathological findings and parasite identification.