title: Recovery of thyroid function with a decreased titre of antimicrosomal antibody in a hypothyroid man with Hashimoto's thyroiditis.
abstract: A 36 year old man with a diffuse goitre, signs of mild hypothyroidism, strikingly low levels of T4 (0.9 micrograms/dl) and T3 (24 ng/dl), elevated TSH (140 microU/ml) and elevated microsomal haemagglutination antibody (MCHA, 1:409 600), subsequently became non-goitrous and euthyroid with a decreased titre of antimicrosomal antibody without any medication. At the time of surgical biopsy, serum levels of T4 and T3 had risen to the normal range (4.6 micrograms/dl and 73 ng/dl, respectively), serum TSH had decreased to 30 microU/ml and the titre of MCHA to 1:25 600. Thyroid specimens showed Hashimoto's thyroiditis. The activity of thyroid peroxidase (TPO) was normal. The latest examination, 1 year and 3 months after initial evaluation, showed that the patient remained euthyroid with no goitre, that serum thyroid hormones were within the normal range (T4 7.7 micrograms/dl and T3 97 ng/dl), and that TSH was not detectable. The titre of MCHA decreased strikingly to 1:400.
mesh_terms: D000328:Adult; D000906:Antibodies / Q000032:analysis*; D006801:Humans; D007037:Hypothyroidism / Q000209:etiology* / Q000276:immunology; D008297:Male; D013960:Thyroid Function Tests; D013961:Thyroid Gland / Q000276:immunology*; D013967:Thyroiditis, Autoimmune / Q000150:complications* / Q000276:immunology; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D000906:Antibodies; D014284:Triiodothyronine; D013972:Thyrotropin; D013974:Thyroxine