Investigation used for CSF rhinorrhoea are all except: (A) CT cisternogram, (B) Skull X-ray, (C) beta2 transferrin, (D) Nasal endoscopy
Answer is D. Advanced nasal endoscopic techniques can be used for CSF leak repair but not for investigation. CT cisternogram requires intrathecal injection of iohexol and a CT scan to localize the site. b 2 transferrin proteindetection by electrophoresis is asensitive and specific test for CSF.