以下为句子列表：
英文: A 39year-old man presented with a deep-seated nodule with central ulceration of the upper lip for a three-month duration.
中文: 一个39岁的男病人，在上唇深处有一颗持续三个月的结节，后来其表面的中央生成溃疡。
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英文: A 55-year-old man presented with a painless, brown subcutaneous tumor over medial side of his left lower leg for 5 years.
中文: 摘要一位55岁男性病患者，五年前在其左下腿内侧有一个褐色、不痛的皮下肿瘤。
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英文: We report a case of 81-year-old man presented with progressive numbness and weakness of both lower limbs for one year.
中文: 我们报告一81岁男性病例，临床上表现为渐进性的两脚麻木及无力约一年之久。
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