comparison of pretreatment and post-treatment whole body scan results (wbs) with i-131 in 94 patients with differentiated thyroid cancer (dtc) [persian]

discrepancy between pre & post treatment wbss (low dose & high dose, respectively) is reported. the aim of this study was determination the post-treatment wbs role in the diagnosis of lesions not identified by the pretreatment one. in this study 94 patients (pts) with dtc were evaluated. the results of pre & post treatment wbss were compared. overall, 25.6% of pts revealed more positive lisions in comparison with their pretreatment wbs. the increase in positive results in pts35yr was 25%. in males and females, the increased values were 33.3% & 23.58% respectively. in all types dtc post-treatment wbs revealed more involvement. in cases limited to thyroid, with capsular invasion and with lymph node involvement the increased values were: 20.5%, 28.5% & 35.7%, respectively. in cases with tsh30 mu/l, 22.2% more positive lesions were observed. pts with htg10 ng/ml, post-treatment wbs revealed more lesions in 28% & 21.8%, respectively. conclusion: post-treatment wbs improves rate of detection of thyroid cancer lesions. in our study this was especially true in cases with tsh