Fuse T, Nagai H, Ohara S, Fukushima T, Fukuoka H, Takagi T, Banno T, Nakamura T
Neurol Med Chir (Tokyo). 1989 Oct;29(10):933-7. doi: 10.2176/nmc.29.933.
A 39-year-old male experienced unilateral right hearing loss and tinnitus for 7 years and was hospitalized after he suddenly developed severe headache, vertigo, and right facial paralysis. Computed tomography (CT) showed a round, high-density are in the right cerebellopontine angle. Magnetic resonance (MR) imaging demonstrated a crescent-shaped region of high signal intensity, representing hemorrhage, in the superior aspect of the tumor, surrounded by edema. The right internal auditory canal was enlarged. Four-vessel angiography disclosed neither an aneurysm nor an arteriovenous malformation. A right suboccipital craniectomy revealed an encapsulated mass 3 cm in diameter in the right cerebellopontine angle. The tumor was totally removed. Histological examination revealed a typical neurinoma composed of Antoni type A and B cells. After undergoing anastomosis of the right hypoglossal and facial nerves, the patient was discharged in good condition. In this case MR imaging demonstrated intratumoral hemorrhage (which is rare in cases of acoustic neurinoma) and the surrounding tissue more clearly than did CT scanning.
一名39岁男性有右侧单侧听力丧失和耳鸣7年，在突然出现严重头痛、眩晕及右侧面瘫后入院。计算机断层扫描（CT）显示右侧桥小脑角有一圆形高密度区。磁共振（MR）成像显示肿瘤上方有一新月形高信号区，代表出血，周围有水肿。右侧内耳道扩大。四血管血管造影未发现动脉瘤或动静脉畸形。右侧枕下颅骨切除术显示右侧桥小脑角有一个直径3厘米的包膜肿块。肿瘤被完全切除。组织学检查显示为典型的由Antoni A型和B型细胞组成的神经鞘瘤。在进行右侧舌下神经和面神经吻合术后，患者情况良好出院。在本病例中，MR成像比CT扫描更清楚地显示了肿瘤内出血（这在听神经瘤病例中很少见）及周围组织。
