BACKGROUND Bleeding of brainstem cavernous malformations (BSCM) cause high morbidity and should be treated surgically whenever possible. METHOD We present a 56-year-old man, who was diagnosed with a BSCM at right pons, which caused functional impairments of dorsal column, spinothalamic tract, cochlear nucleus, and middle cerebellar peduncle. A transmastoid presigmoid retorlabyrinthine approach via the lateral pontine zone (LPZ), with an assistance of imaging guidance and intraoperative neurophysiological monitoring, was performed to completely resect the BSCM. The patient recovered despite a transient worsening of cerebellar sign and hemiparesthesia for 1 week, without surgical complications. CONCLUSIONS A transmastoid presigmoid retrolabyrinthine approach through LPZ is safe and effective for lateral pontine BSCM resection.

中文翻译：

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经乳突前乙状结肠后迷路摘除术治疗桥脑海绵状畸形：我该怎么做。

背景技术脑干海绵状畸形（BSCM）出血会导致高发病率，应尽可能通过外科手术治疗。方法我们介绍了一名56岁的男性，该男性被诊断为右脑BSCM，导致背柱，脊椎丘脑束，耳蜗核和小脑中指的功能受损。经影像学指导和术中神经生理学监测，经桥脑外侧区（LPZ）经乳突前乙状窦道迷宫穿刺入路，以完全切除BSCM。尽管小脑体征和半感觉异常短暂恶化，但患者恢复了1周，没有手术并发症。结论LPZ经乳突前乙状窦后迷路入路安全，有效地行桥脑桥BSCM切除术。