某些情况下，这些粘连需要手术切除。

In some cases, adhesions must be surgically removed.

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不幸的是，目前的选择是有限的，往往需要手术切除。

Unfortunately, the current options are limited and often necessitate surgical removal.

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另外，研究者认为一些较小的肿瘤可能不需要手术切除。

In addition, some of the smaller tumors may not need surgical removal, the researchers speculated.

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