Jayarao Mayur, Devaiah Anand K, Chin Lawrence S
Department of Neurosurgery, Boston Medical Center, Boston, Massachusetts, USA.
J Neurosurg Pediatr. 2009 Aug;4(2):121-4. doi: 10.3171/2009.3.PEDS08416.
Arachnoid cysts are benign, intraarachnoid cysts filled with cerebrospinal fluid that are usually encountered in the middle cranial fossa. If present in the posterior fossa, they usually produce nonspecific signs and symptoms such as headaches, dizziness and vertigo. We report the rare presentation of a young girl with right-sided sensorineural hearing loss and tinnitus secondary to a right cerebellopontomedullary arachnoid cyst. The patient underwent a suboccipital retrosigmoid (retromastoid) craniectomy with fenestration of the arachnoid cyst. Subsequently, the patient experienced improvement in hearing with near-complete resolution of sensorineural hearing loss. To the authors' knowledge, postoperative near-complete resolution of hearing loss secondary to posterior fossa arachnoid cysts in a pediatric patient has not been previously reported. The authors also review the literature with respect to posterior fossa arachnoid cysts and discuss their clinical features, diagnosis, and management.
蛛网膜囊肿是良性的蛛网膜内囊肿，充满脑脊液，通常位于中颅窝。如果出现在后颅窝，它们通常会产生非特异性的体征和症状，如头痛、头晕和眩晕。我们报告了一名年轻女孩罕见的病例，她因右侧小脑脑桥延髓蛛网膜囊肿继发右侧感音神经性听力损失和耳鸣。该患者接受了枕下乙状窦后（乳突后）颅骨切除术及蛛网膜囊肿开窗术。随后，患者听力得到改善，感音神经性听力损失几乎完全消失。据作者所知，此前尚未有小儿患者后颅窝蛛网膜囊肿继发听力损失术后几乎完全恢复的报道。作者还回顾了关于后颅窝蛛网膜囊肿的文献，并讨论了它们的临床特征、诊断和治疗。
