Pasquale Anania - Department of Neurosurgery, Policlinico San Martino Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy.
Marco Ceraudo - Department of Neurosurgery, Policlinico San Martino Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy.
Alessandro Prior - Department of Neurosurgery, Policlinico San Martino Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy.
Pietro Fiaschi - Department of Neurosurgery, Policlinico San Martino Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy. and Department of Neurosciences, Rehabilitation, Ophtalmology, Genetics, Maternal and Children(DINOGMI), University of Genoa, Genoa,
Gianluigi Zona - Department of Neurosurgery, Policlinico San Martino Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy.
Frank Canevari - Department of Otorhinolaryngology-Head and Neck Surgery, University of Genoa, Genoa, Italy.
Diego Criminelli Rossi - Department of Neurosurgery, Policlinico San Martino Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy.

Introduction:Transpterygoid approach is an expanded endonasal approach (EEA) that allows surgical access to the medial infratemporal fossa, to the skull base area of petrous bone and to the Meckel’s cave. During this approach, a sacrifice of sphenopalatine artery is often required, leading to the need of contralateral Hadad-Bassagasteguy flap (HBF) or alternative reconstructive techniques. Materials and Methods:We report a case of spontaneous CSF leak due to a meningo-encephalocele in the left lateral recess of sphenoid sinus, in which an ispilateral nasoseptal flap was harvest and sphenopalatine artery was preserved. Results:We described the surgical technique adopted to preserve the ipsilateral nasoseptal vascular pedicle during transpterygoid approach and we performed a review of the pertinent literature.Conclusion:Wide exposure of the pterygoid base through transpterygoid approach could be obtained preserving the sphenopalatine artery, allowing skull base reconstruction with ipsilateral nasoseptal flap.

Endoscopy, Endonasal, Ipsilateral, Nasoseptal, Reconstruction, Skull base, Transpterygoid