Clinical and Pathological Findings of Thyroid Adenocarcinorna in a Cow

Abstract

A 5-year-old Holstein cow was shown to have a tumor mass 20cm in diameter in the subcutis of the ventral neck around the larynx, with significantly high serum T4 and T3 levels. Neither bacteria nor neoplastic cells were detected from bloody serous content of the mass. Symptomatic therapy for additional diagnoses of vagus indigestion and renal failure, was not effective. Postmortem histopathology of the mass revealed active proliferation of atypical follicular cells with follicle formation and invasive growth to the surrounding, tissues.