1. Even in cases of acoustic neuroma without psychiatric symptoms before surgical intervention, secondary mania could develop after surgery.

中文翻译：

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听力神经瘤切除术后五个月，一名老年患者出现新发躁狂。

1.即使在手术干预前听神经瘤没有精神症状的情况下，手术后仍可能发生继发性躁狂。