case_images: PMC11071344_01
case_images: Gross features of thyroglossal duct cyst. (A) Ventral view of the cervical and cranial extremity of the thoracoabdominal cavity, showing the presence of a large mass directly attached to the left thyroid gland (white arrow). (B,C) The mass is well demarcated, showing moderate compression of the adjacent thyroid gland. Scale bar = 0.5 cm. R-TG, right thyroid gland; L-TG, left thyroid gland; SCA, subclavicular artery; CCA, common carotid artery; PT, parathyroid gland.
case_images: fvets-11-1388152-g001.jpg
case_images: PMC11071344_01_fvets-11-1388152-g001.jpg
case_images: fig1
case_images: The animal presented multifocal nodular and ulcerative cutaneous lesions at the head, neck, and chest level, as well as multifocal-coalescing diphtheroid stomatitis and conjunctivitis. A large, white-gray, well-demarcated, dense, cyst-like structure measuring 0.5 cm was present in the caudal edge of the left thyroid gland. The mass was directly attached to the caudal edge of the thyroid gland and showed moderate compression of the adjacent parenchyma (Figure 1).
case_images: Histopathological images of the thyroglossal duct cyst. (A,B) A thin-walled (arrows), well-demarcated cyst (double arrow) contains a large amount of homogeneous, eosinophilic product (asterisks) that is compressing the adjacent thyroid gland (L-TG). (C,D) The cyst is bordered by 1-2 lines of ciliated cuboidal cells (arrowheads) and goblet cells that show nuclear immunoreactivity for TTF-1 ((C), inset). The ciliated epithelium is supported by dense fibrous connective tissue. The cyst content is immunopositive for thyroglobulin ((D), inset). H&E stain, ob x 4 (A), x 10 (B), and x100 (C,D). *A large amount of homogeneous, eosinophilic product.
case_images: fvets-11-1388152-g002.jpg
case_images: PMC11071344_01_fvets-11-1388152-g002.jpg
case_images: fig2
case_images: The epithelial cells showed a nuclear immunoreactivity for TTF-1, demonstrating the thyroidal origin (Figure 2).