Prospective study of the changes in thyrotropin binding inhibitory immunoglobulins in Graves' disease treated by subtotal thyroidectomy or radioactive iodine

Journal Article · Sun Jun 01 04:00:00 EDT 1980 · J. Clin. Endocrinol. Metab.; (United States)

DOI:https://doi.org/10.1210/jcem-50-6-1005· OSTI ID:5220047

Teng, C S; Yeung, R T.T.; Khoo, R K.K.; Alagaratnam, T T

The effects of subtotal thyroidectomy and radioactive iodine on thyroid-stimulating immunoglobulins, as measured by a receptor assay, more appropriately termed TSH binding inhibitory immunoglobulins (TBII), were studied in 74 patients with Graves' disease. Fourty-four patients received radioactive iodine therapy, while 30 were subjected to subtotal thyroidectomy. After radioactive iodine, more patients were TBII-positive (90.5% vs 81.8%) than before treatment, and the mean TBII index decreased dramatically, the maximum decrease being 3 months. The mean TBI index subsequently returned gradually to the pretreatment level. Subtotal thyroidectomy had a different effect on TBII activity. TBII indices were positive in 89.3% of these patients before any treatment but were positive in only 40% (12 patients) after antithyroid drugs had been given before surgery. After surgery, TBII indices remained positive in 7 patients, while the remaining 5 patients became TBII negative. Seventeen patients (56.7%) were TBII negative before operation and remained so after surgery. One patient who was TBII negative before operation became TBII positive 2 months after operation. Interestingly, postoperative relapse of hyperthyroidism occurred in 3 patients who were TIBII positive, while hypothyroidism occurred in patients who were TBII negative. Thus, the TBII activity after subtotal thyroidectomy might be an important factor in determining the outcome of surgery.

• Research Organization: Univ. of Hong Kong
• OSTI ID: 5220047
• Journal Information: J. Clin. Endocrinol. Metab.; (United States), Journal Name: J. Clin. Endocrinol. Metab.; (United States) Vol. 50:6; ISSN JCEMA
• Country of Publication: United States
• Language: English

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ANTITHYROID DRUGS
BETA DECAY RADIOISOTOPES
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ENDOCRINE DISEASES
ENDOCRINE GLANDS
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INTERMEDIATE MASS NUCLEI
INTERNAL IRRADIATION
IODINE 125
IODINE ISOTOPES
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ORGANIC COMPOUNDS
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RADIATION EFFECTS
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RADIOLOGY
RADIOTHERAPY
SIDE EFFECTS
SURGERY
THERAPY
THYROID
THYROID HORMONES
THYROIDECTOMY
TSH