IntroductionCerebrospinal fluid (CSF) rhinorrhea is the result of a bony defect at the skull base with disruption of the arachnoid, dura mater, and sinonasal mucosa that leads to an active CSF leak and flow of clear fluid from the nose.The endoscopic repair of CSF leaks and skull defects have been used by an increasing number of surgeons and is the standard of care for repairing CSF leaks. ConclusionsThe endonasal endoscopic approach is the current standard of care for repairing most CSF leaks and skull base defects.We have had an excellent experience with endonasal endoscopic CSF leak repair, with high success rates and low morbidity.Our results support the effectiveness and safety of this technique and should encourage otolaryngologists to apply the procedure in cases of CSF leak.