Abstract: Spontaneous sphenoid sinus CSF leak is relatively rare entity. Sternberg’s canal is a bony defect in lateral wall of sphenoid sinus which is a common site of spontaneous CSF leak. Here we present a case of spontaneous CSF rhinorrhea from lateral recess of sphenoid sinus. Site of leak was approached endoscopically with trans-septal approach as it gives excellent access to lateral recess sphenoid sinus defects. Closure of defect was done with bathplug technique with graft threaded on the same thread to ensure central placement of the graft over defect. Obliteration of sphenoid sinus is not mandatory if complete mucosa is exenterated and anterior wall is drilled adequately.