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Figure18-18
Figure 18-18. Changes in serum TG after therapeutic doses of radioiodine in patients with negative basal whole-body scans. The arrows indicate the administration of therapeutic doses of 131-I. The numbers represent individual patients. In most patients, thyroglobulin decreased, although only in a few to a level that would indicate absence of residual disease. (From Pacini et al, J Nuc Med 28:18888-1891, 1987)
