Tank went in for adrenal surgery, and the vet sent the adrenal out for a biopsy, which came back with a diagnosis of adrenal cortical carcinoma: MICROSCOPIC FINDINGS: The piece of the left adrenal gland shows marked disorganization of the normal architecture. Remnants of the zona glomerulosa are evident and these cells appear atrophic. The bulk of the sample consists of broad sheets of neoplastic round to polyhedral epithelial cells of the zona fasiculata. These cells are further subdivided into smaller trabeculae and cords by delicate fibrovascular septa. The tumor cells have round to ovoid to oblong open nuclei with a single nucleolus. All cells have abundant amounts of eosinophilic cytoplasm. Mitotic figures range from 0-3 per 400x field. In one region, these tumor cells extend through the capsule to the periadrenal adipose tissue. DIAGNOSIS: Adrenal cortical carcinoma. COMMENT: This animal does have an adrenal tumor and it is derived from the zona fasiculata. The tumor is considered malignant. There is already some invasion through the adrenal capsule. I would offer a guarded to poor long term prognosis. Tank is a fixed male ferret, about 3-1/2 to 4 years old, and he had always been healthy up until now. Any bright ideas on what should be done next, or what I'm in for, or what I should watch for? My vet is also checking on this, but on the FML, we have the advantage of large numbers of cases and vets. -- Joyce --- Joyce Miller, [log in to unmask] [Posted in FML issue 3033]