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A child with unilateral abducens nerve palsy and neurovascular compression in Chiari malformation type 1 resolved with posterior fossa decompression: illustrative case

Olivia A Kozel, Belinda Shao, Cody A Doberstein, Natalie Amaral-Nieves, Matthew N Anderson, Gita V Harappanahally, Michael A Langue, and Konstantina A Svokos

instances of contact between the abducens nerve and the AICA. 28 Symptomatic neurovascular compression of the abducens nerve is rare. A few reported cases have implicated compression from the AICA or a dolichoectatic VA. 29 , 30 Given the difficult skull base approach to the prepontine cistern 31 and the rarity of the condition, microvascular decompression of the abducens nerve is seldom undertaken, in contrast to more commonly decompressed pathologies such as hemifacial spasm and trigeminal neuralgia. 32 – 35 One review noted that only 6 of 22 cases of abducens nerve