以下为句子列表：
英文: Abstract: Objective: To improve the understanding and diagnosis of embryonal rhabdomyosarcoma of biliary tree in childhood.
中文: 文摘:目的：提高对小儿胆道胚胎型横纹肌肉瘤(葡萄状肉瘤)的认识，减少误诊。
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英文: Conclusions: Embryonal rhabdomyosarcoma of the biliary tree, though rare, is the most common cause of biliary obstruction due to malignancy in childhood.
中文: 结论：胆道胚胎型横纹肌肉瘤极罕见，但小儿胆系恶性肿瘤多为该种肉瘤。
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英文: Leiomyosarcoma is the most common primary renal sarcoma. Most patients are beyond 40 years of age; M:F = 2:1. The tumor is composed of intersecting fascicles of smooth muscle cells.
中文: 平滑肌肉瘤是最常见的肾原发性肉瘤。绝大多数病人超过40岁，男：女＝2：1。肿瘤是由纵横交错的平滑肌束组成。
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英文: Methods: The management of 2 children with embryonal rhabdomyosarcoma of the biliary tree was reviewed.
中文: 方法：对2例小儿胆道胚胎型横纹肌肉瘤的诊治经验教训进行分析，并复习有关文献。
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英文: Three cases of leiomyosarcoma died of recurrence, only one survived 4 years after operation.
中文: 21例平滑肌瘤均行肿瘤切除术，4例平滑肌肉瘤，3例行肿瘤切除术，1例行活检术。
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