Kameyama S, Tanaka R, Kawaguchi T, Honda Y, Yamazaki H, Hasegawa A
Department of Neurosurgery, Brain Research Institute, Niigata University, Japan.
Acta Neurochir (Wien). 1996;138(2):206-9. doi: 10.1007/BF01411362.
We examined growth potential of residual intracanalicular tumours left from subtotal removal of large acoustic neurinomas. Eleven patients were followed-up by magnetic resonance (MR) imaging. The interval between surgery and MR study ranged from 12 to 29 years (median, 16 years). MR images of two patients showed no evidence of tumour remnant, and in six a small tumour was localized in the internal auditory canal. The other three showed an intracanalicular tumour protruding slightly towards the intracranial portion. This result suggests that the intracanalicular residual tumours have less risk of regrowth after subtotal removal of acoustic neurinomas. It is advisable to choose intracapsular, subtotal removal without opening the internal auditory canal in the treatment of acoustic neurinoma, if it is large in size and there is a high risk of nerve injury.
我们研究了大型听神经瘤次全切除术后残留的管内肿瘤的生长潜能。11例患者接受了磁共振（MR）成像随访。手术与MR检查的间隔时间为12至29年（中位数为16年）。2例患者的MR图像未显示肿瘤残留迹象，6例患者在内听道发现小肿瘤。另外3例显示管内肿瘤向颅内部分略有突出。这一结果表明，听神经瘤次全切除术后管内残留肿瘤的复发风险较低。如果听神经瘤体积较大且存在神经损伤的高风险，在治疗听神经瘤时，建议选择囊内次全切除且不打开内听道。
