Paramedian supracerebellar infratentorial approach for clipping a ruptured aneurysm in the cerebellomesencephalic segment of the left superior cerebellar artery: A case report

Superior cerebellar artery (SCA) aneurysms are rare, especially for those arising from the distal portion of the SCA. In this study, we presented a case of a ruptured aneurysm arising from cerebellomesencephalic segment of the SCA. A woman with severe headache and neck stiffness had a ruptured aneurysm arising from cerebellomesencephalic segment of the left SCA. Treated successfully with left-sided paramedian supracerebellar infratentorial (SCIT) approach for clipping the aneurysm with a sitting position, discharged after 14 days without neurological deficit. SCA aneurysms can be managed by endovascular coiling or microsurgical clipping. Although both modalities pose risks of damaging the brainstem perforators, the incidence of the SCIT approach is low since it is exposure from laterally to medially and from distal to proximal along the course of SCA. In our viewpoint, the paramedian SCIT approach is a safe and effective treatment for clipping aneurysms arising from the distal portion of the SCA.