• Dimitrios Panagopoulos, Marios Themistocleous, and Georgios Sfakianos.
• Neurosurgical Department, "Agia Sophia" Children's Hospital, Athens, Greece. Electronic address: dimpanayop@gmail.com.
• World Neurosurg. 2019 Mar 1; 123: 259-264.

BackgroundTransclival meningoceles and related primary spontaneous cerebrospinal fluid leaks at the clivus are extremely rare lesions, with only a few cases reported in the literature.Case DescriptionAn infant presented with nasal airway obstruction and meningitis secondary to cerebrospinal fluid leak from a transclival meningocele. The radiologic investigation and surgical repair of the lesion are reported, along with intraoperative findings. Basic anatomy, embryology, and development of the clivus are reviewed to clarify the relationship of anatomic variants with the formation of transclival meningoceles.ConclusionsTransclival meningocele should be considered in patients with spontaneous cerebrospinal fluid rhinorrhea. The existing classification of meningoencephaloceles based on the location of the defect in the cranium should probably be reconsidered, taking into consideration the described entity.Copyright © 2018 Elsevier Inc. All rights reserved.

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