Iodine-deficiency goitre in a bitch

Goitrous hypothyroidism associated with treatment with trimethoprim-sulfamethoxazole in a young dog

“…Most reported cases of goiter in dogs are congenital in origin, [20][21][22] although dietary (iodine-deficient and iodine-excess) 23,24 and drug-induced 6 goiter have also been described. In 2 reports of dogs with congenital goiter, a nonsense mutation in the gene for thyroid peroxidase was identified.…”

Imaging Diagnosis—acquired Goitrous Hypothyroidism Following Treatment With Trimethoprim Sulfamethoxazole

“…Goiter is nonneoplastic, noninflammatory thyroid gland enlargement secondary to insufficient synthesis of thyroid hormones 2,3 . Goiter is rarely reported in dogs, with the most common cause being congenital hypothyroidism, 4–6 although dietary (iodine‐deficient and iodine‐excess) 7,8 and drug‐induced goiter 9 have also been described 1 …”

Dermatology: The skin, nutritional deficiencies and supplements in dogs and cats: Part 2

“…Naturally-occurring iodine deficiency is rare but has been reported in dogs fed an all-meat diet (Thompson, 1979;Nuttall, 1986). The principal sign was goitre, accompanied by dry, sparse hair and alopecia.…”