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Background. The decision to extend thyroidectomy to the opposite lobe during resection of well-differentiated thyroid cancer should include an analysis of complications of I-131 radioablation directly related to the thyroid remnant. If significant, then contralateral resection would be indicated. To clarify this issue we studied the incidence of complications of I-131 radioablation in 63 cases of well-differentiated thyroid cancer.
Methods. Retrospective reviews of operative notes, pathology reports, office records, and physician interviews were made. We analyzed operations, complications, and radiation dosing.
Results. Procedures included unilateral thyroidectomy, 10 (75.9%); subtotal thyroidectomy, seven (11.1%); near-total thyroidectomy, 25 (39.7%); and total thyroidectomy, 21 (33.3%). The average ablative dose was 101 mCi (range, 30 to 208 mCi). Nineteen percent (12 of 63) of patients had complications including radiation thyroiditis (eight), chronic sialoadenitis (one), odynophagia (one), facial edema (one), and shingles (one). Near-total or total' thyroidectomy resulted in significantly fewer complications compared with lesser resections (8:7% versus 47.1 %, p < 0.005).
Conclusions. The incidence of complications of I-131 radioablation after thyroidectomy for well-differentiated thyroid cancer is related to the extent of thyroidectomy performed. We recommend contralateral thyroid resection (resulting in a near-total or total thyroidectomy) in patients likely to receive postoperative I-137 radioablation.
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☆Presented at the Fifteenth Annual Meeting of the American Association of Endocrine Surgeons, Dearborn, Mich., April 17–19, 1994.
© 1994 Published by Elsevier Inc.