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Spontaneous cerebrospinal fluid (sCSF) leak from the skull base has been previously reported, but there are few reports of sCSF leak from the foramen rotundum due to its rare occurrence. This case report describes a 15-year-old male patient that presented with left side watery rhinorrhoea that had been present since he was 4 years of age and a history of repeated bouts of meningitis of unknown cause. A discharge sample from the nose tested positive for beta-2 transferrin. Preoperative computed tomography (CT) revealed a fistula between the cerebellopontine angle and the left sphenoid sinus. There was also a pseudo-Chiari malformation type I with ectopia of the cerebellar tonsil. Endoscopic transnasal surgery identified a leak from the foramen rotundum that was repaired using autologous material and a contralateral pedicle nasoseptal flap. At 6 months after surgery, the patient reported no recurrence of the CSF leakage. Postoperative CT imaging revealed that the cerebellar tonsil was back in the normal position, indicating that the preoperative Chiari malformation was possibly due to decreased CSF volume. This current case shows that a rare case of sCSF leak from the foramen rotundum can be effectively repaired using the endoscopic transnasal approach.

journal of international medical research

Spontaneous cerebrospinal fluid leak via foramen rotundum in a non-obese male presented as pseudo-Chiari malformation type I: a case report and literature review