question: I had transsphenoidal pituitary surgery almost 4 weeks ago. The day after surgery I developed CSF leak (leaked through my nose). The put in a lumbar drain and I layed flat for seven days. After the 7 days there were no signs of the leak. I just developed a post nasal drip that taste salty. My Neurosurgeon said it is most likely sinus drain as well as fluid from the surgery since they inserted a sponge. Should I be concerned that the CSF leak has returned?