Unilateral renal cystadenocarcinoma and nodular dermatofibrosis in a mixed-breed dog carrying a FLCN gene mutation.

This case supports the hypothesis that nodular dermatofibrosis is not a paraneoplastic syndrome associated with cystadenocarcinoma. It may be instead an independent dermatological feature of the same genetic disease, linked to the mutation of FLCN given that the cutaneous nodules in this dog increased in size and number after removal of the adenocarcinoma.