Ectopic lingual thyroid tissue in a cat.
Ectopic thyroid tissue was identified at the base of the tongue in a 9-year-old, euthyroid, domestic shorthair cat. The lingual submucosa and the muscles were replaced by thyroid tissue, which consisted of various-sized follicles each lined by a row of cuboidal epithelium. Many follicles contained eosinophilic, periodic acid Schiff-positive, colloid material. Imunohistochemically, the epithelial cells stained positive for AE(1)/AE(3)and thyroglobulin. No calcitonin positive cells or parathyroid tissue was seen. The cat has been followed for 1018 days after surgery, is clinically well and remains euthyroid.
Patnaik
A K
AK
Department of Pathology, The Animal Medical Center, 510 East 62nd Street, New York 10021, USA.
Peterson
M E
ME
Hidgon
A
A
D000818:Animals; D002371:Cat Diseases / Q000175:diagnosis* / Q000601:surgery; D002415:Cats; D002828:Choristoma / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*; D005260:Female; D007150:Immunohistochemistry / Q000662:veterinary; D013961:Thyroid Gland; D014060:Tongue Diseases / Q000175:diagnosis / Q000601:surgery / Q000662:veterinary*