颞骨内微型面神经鞘瘤病理研究

目的探讨颞骨内微型面神经鞘瘤的原发部位和病理行为。方法用光镜对８１５人（１５２６侧）颞骨连续切片进行面神经颞骨内全程组织病理学观察。结果发现未诊断的无症状微型ＡｎｔｏｎｉＡ型面神经鞘瘤１５人（１７耳），占１．８４％。依其病理行为特征分为外生性（１３耳，起自面神经管裂处神经束膜，并向管外生长）和内生性（４耳，起自面神经主干）两种类型。肿瘤起自迷路段者２耳，水平段１２耳，第二膝段１耳，垂直段２耳。结论将颞骨内面神经鞘瘤分为内生性和外生性两种类型有重要的病理和临床意义，有助于手术目的的确定和手术方法的设计

Histopathologic study on intratemporal minimal facial nerve neurilemmomas

Objective To explore the original location and pathologic behavior of facial nerve neurilemmomas. Methods Human temporal bone slides from 815(1 526 ears)were histopathologically observed under light microscope. Results Seventeen(1.84%) undiagnosed intratemporal facial nerve neurilemmoma with morphologic indications of Antoni type A were found. According to pathologic features, the intratemporal facial nerve neurilemmomas were classified as ingrowing facial nerve neurilemmomas (4 ears) which originated from the center of facial nerve,and outgrowing facial nerve neurilemmomas (13 ears) which originated from the perineurium at dehiscence of the facial nerve canal. Of the 17 tumors, two originated from the labyrinthine segment, twelve from the tympanic segment, one from second turn and two from vertical segment. Conclusion It is of important pathologic and clinical significance to classify the intratemporal facial nerve neurilemmomas into outgrowing and ingrowing types.