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在 Ohio州 Cinccnnati研究所于 1984～ 1999年诊断的 2 382例乳腺癌中 ,5 1例同期有双侧病变(2 .1% ) ,同期是指在确诊第一个乳腺癌后的 3个月内发现另一侧乳腺癌 ,5 7%的同期双侧乳腺癌组织学类型是相同的。取以人口为基础的 Connecticut肿瘤登记(CTR) ,属国家癌肿研究所监测
Of the 2 382 breast cancers diagnosed in the Cinccnnati Institute in Ohio from 1984 to 1999, 51 had bilateral lesions (2.1%) in the same period and 3 months after the first breast cancer was diagnosed The other breast cancer was found in 57% of bilateral breast cancer histological types in the same period. Population-based Connecticut Tumor Registry (CTR), monitored by the National Cancer Institute