Quimiodectoma, colangiocarcinoma, leydigocitoma, adenoma adrenocortical e adenoma folicular de tireoide concomitantes em um cão.

Abstract

Neoplasms in small animals have become something frequent, due to the longevity of animals, due to a better feeding through balanced diets and the prevention of infectious diseases through vaccination and advances in diagnostic methods. The simultaneous development of neoplasms in two or more organs in a single individual is rare in veterinary medicine, with two distinct tumors occurring more frequently and very rarely 3 or more, without racial predisposition or sex. The grouping of this syndrome is done using the same human grouping in 3 ways: MEN1, MEN2 and MEN3. The animal reported in this case study was seen at the veterinary hospital of the Federal University of Paraíba - Campus II, Areia - PB. It was a male dog, body score 3, boxer breed, 18 years old. He arrived at the Veterinary Hospital in cardiopulmonary arrest, dying. He was referred to the necropsy sector, where he was found to have five distinct neoplastic types, simultaneously affecting him. The macroscopic and histopathological findings allowed the diagnosis of chemiodectoma, cholangiocarcinoma, leydigocytoma, adrenocortical adenoma and follicular adenoma of the thyroid. The chemiodectoma is a tumor originating from the chemoreceptors at the base of the heart, and can be located in both the aortic and carotid bodies. Cholangiocarcinoma is a malignant neoplasm of epithelial origin, originating from different places in the biliary tree. The tumor of the leydig cells or Leydigocytoma is a neoplasm that affects the cells that produce testosterone. Adrenocortical adenoma is a benign neoplasm that mainly affects dogs of large breeds and may be functional or not, leading the animal to present with Cushing's syndrome. Follicular thyroid adenomas are mobile tumors, little invasive locally and almost always not produce clinical signs of hypo or hyperthyroidism. The case in question is rare, due to the fact that it does not fit the classification of the described cases and the animal presents, testicular involvement and other neoplasms nor mentioned in this classification, totaling five distinct neoplasms affecting the animal simultaneously.