Alaani A, Hogg R, Siddiq M A, Chavda S V, Irving R M
Department of ENT, Queen Elizabeth Hospital, Birmingham, UK.
J Laryngol Otol. 2005 May;119(5):337-41. doi: 10.1258/0022215053945903.
Arachnoid cysts can occur at different intracranial sites, including the cerebellopontine angle (CPA). The incidence of arachnoid cysts is 1 per cent of all intracranial lesions. Recent advances in MRI (magnetic resonance imaging) scan techniques have led to CPA arachnoid cysts being more frequently diagnosed and with a higher degree of certainty. The need for further understanding of their natural history as well as for the development of a management rationale has been highlighted with this increased rate of diagnosis. We present a series of five adult patients with different clinical presentations attributed to CPA arachnoid cysts. These lesions have a characteristic location in the posterior-inferior aspect of the CPA below the facial and vestibulocochlear nerves. These cysts did not show change in size on repeated MRI scan and the patients' symptoms did not progress over the period of follow up. Our findings would support a conservative management approach to the majority of these cysts.
蛛网膜囊肿可发生于不同的颅内部位，包括桥小脑角（CPA）。蛛网膜囊肿的发生率占所有颅内病变的1%。磁共振成像（MRI）扫描技术的最新进展使得桥小脑角蛛网膜囊肿的诊断更为频繁，且确定性更高。随着诊断率的提高，进一步了解其自然病史以及制定治疗原则的必要性也凸显出来。我们报告了一系列5例因桥小脑角蛛网膜囊肿而出现不同临床表现的成年患者。这些病变位于桥小脑角后下方、面神经和前庭蜗神经下方的特征性位置。这些囊肿在重复MRI扫描时大小未显示变化，且患者症状在随访期间未进展。我们的研究结果支持对大多数此类囊肿采取保守治疗方法。
