Lungo M, Tenenbaum F, Chaumerliac P, Vons C, Mirat A, Beuzen F, Luton J P, Richard B
Service de médecine nucléaire, Paris, France.
Ann Endocrinol (Paris). 2000 May;61(2):147-50.
A whole body scan is performed after a radioiodine treatment in patients with differentiated thyroid carcinoma. This scan is useful coupled with thyroglobulin level for the patient's management. When unusual uptake is found, investigations have to be done to eliminate thyroid metastasis. A 28-year old woman underwent a total thyroidectomy for micro papillary carcinoma. Two years and a half after, ultrasonography of the neck showed a small lymph node in homolateral side of carcinoma. It was decided to begin treatment with iodine 131. The post-therapeutic scan showed an abnormal pelvic uptake. IRM found no osseous abnormality but an ovarian lesion. After surgery, histological diagnosis was an endometriosis cyst without thyroid or tumoral cells. Abdominal ou pelvic iodine false positive are rare. Ovarian cysts may be the cause of false positive radioiodine uptake. Endometriosis cyst was not previously described and the mecanism of iodine uptake is not clear.
分化型甲状腺癌患者在接受放射性碘治疗后需进行全身扫描。该扫描结合甲状腺球蛋白水平对患者的管理很有用。当发现异常摄取时，必须进行检查以排除甲状腺转移。一名28岁女性因微小乳头状癌接受了甲状腺全切除术。两年半后，颈部超声显示癌同侧有一个小淋巴结。决定开始用碘131治疗。治疗后的扫描显示盆腔有异常摄取。磁共振成像未发现骨异常，但发现一个卵巢病变。手术后，组织学诊断为子宫内膜异位囊肿，无甲状腺或肿瘤细胞。腹部或盆腔碘摄取假阳性很少见。卵巢囊肿可能是放射性碘摄取假阳性的原因。子宫内膜异位囊肿此前未被描述，碘摄取机制尚不清楚。
