纤维腺瘤和PT的鉴别诊断以及PT的组织学分级仍然具有挑战性。

The differential diagnosis between PT and fibroadenoma and the histologic grading of PT remain challenging.

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然而在这种例子中接下来的事情仍然很具有挑战性，Louis Marino医生说，普罗维登斯巴特勒医院的高级治疗项目主任。

Yet follow-up can still be a challenge in those cases, said Dr.Louis Marino, chief of the Senior Treatment Program at Butler Hospital, in Providence.

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然而在这种例子中接下来的事情仍然很具有挑战性，Louis Marino医生说，普罗维登斯·巴特勒医院的高级治疗项目主任。

Yet follow-up can still be a challenge in those cases, said Dr. Louis Marino, chief of the Senior Treatment Program at Butler Hospital, in Providence.

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