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  • Title: The effect of subtotal thyroidectomy with propranolol preparation on antibody activity in Graves' disease.
    Author: Steel NR, Taylor JJ, Young ET, Farndon JR, Holcombe M, Kendall-Taylor P.
    Journal: Clin Endocrinol (Oxf); 1987 Jan; 26(1):97-106. PubMed ID: 3802553.
    Abstract:
    The effect of subtotal thyroidectomy on thyroid stimulating antibodies (TSAb), thyrotrophin binding inhibitory immunoglobulins (TBII) and antimicrosomal antibodies (MsAb) was studied in 26 patients with Graves' hyperthyroidism treated pre-operatively with propranolol, but without antithyroid drugs. Following surgery, two patients relapsed in the first year and eight patients became hypothyroid. Eighteen patients (69%) had detectable TSAb at entry and no significant change in titre was seen during propranolol therapy. Following surgery TSAb levels fell within 24 h in eight patients, and at 6 weeks only seven patients had detectable TSAb. TSAb were still detectable in seven patients at 6 months. TSAb activity did not predict the late relapses. TBII were present in 13 patients (50%) before surgery and titres remained unchanged in all but two patients during the immediate postoperative period. At 6 weeks TBII had disappeared from the serum of only three patients. During the early post-operative period TBII became transiently detectable in five of the 13 patients initially TBII negative. The two patients who subsequently relapsed remained TBII positive throughout. Microsomal antibodies were present in the sera of 22 patients (85%). Surgery was followed by a decline in titre, which was substantial in only six of 13 patients studied in detail. Thus, in 92% patients hyperthyroidism was successfully eradicated. Propranolol treatment had no effect on antibody activity. TSAb and TBII disappeared from the circulation in 61% and 46% patients, respectively. These data are compatible with the concept that lymphocytes within the thyroid are the major site of TSAb production but other important sites for synthesis of thyroidal autoantibodies probably exist. Although outcome from surgery could not be accurately predicted from TSAb or TBII status either pre- or post-operatively, the two patients who relapsed had the most severe disturbances of thyroid autoimmunity; all patients in whom initially detectable TSAb or TBII disappeared remained in remission.
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