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Three cases of opportunistic dermatoses associated with internal diseases in cats

This document described three cases of opportunistic dermatoses in cats associated with internal diseases. The first case involved a 12-year-old domestic short-haired cat with diabetes and phaeohyphomycosis due to Scytalidium spp., alongside cutaneous hemangiosarcoma. Treatment with itraconazole and amputation extended survival by 12 months despite pulmonary metastases. The second case was a 13-year-old Siamese cat with cheyletiellosis linked to spontaneous Cushing's disease and diabetes mellitus, but the owner declined treatment. The third case involved a 14-year-old domestic short-haired cat with generalized demodicosis related to iatrogenic Cushing's disease and diabetes mellitus, treated with insulin, milbemycin oxime, and chlorambucil, resulting in a cure of demodicosis after 4 months, though the cat later died from herpesvirus infection.