Study of the venous drainage of the thyroid gland in dogs (Canis familiaris).

The authors studied the venous drainage of the thyroid gland in about 30 adult dogs without specific race of both sexes. The study was conducted using Neoprene Latex previously stained with specific pigment injected into cervical venous system, following, after fixation, dissection with disarmed eye or under dissecting microscope (10x). When necessary the cases observed showed 90% more than one venous branch in each glandular pole: 70% one ima thyroid vein and 70% one thyroid venous arch (laringeal); about 50% of dissecting cases drainage exclusively the thyroid gland, whereas the others 50% are responsible for the drainage of surrounding structures.