<prompt> All of the following statements about CSF leak are true, except:Most common site of CSF leak is fovea ethmoidalisBeta 2 transferrin estimation is highly specific for diagnosisFluorescin Dye can be used intrathecally for diagnosis of site of leakMRI Gadolinium chanced Tl images are best for diagnosis of site of leak  <response>: High Resolution Fine Cut CT Scan HRCT is the best investigation of choice to identify the most likely site of Cerebrospinal fluid lCSF leak. A high resolution T2 - weighted MRI Not Tl-weighted may allow visualization of fluid within the sinuses but will allow identification of the site of leak only if the patient is leaking actively at the time of MRI. Thus MRI is not the best investigation. 