I'd like to add that I also had a goose egg shaped swelling around my incision.. I had no other signs of a CSF leak (dripping from nose, ear or mouth are tell tell signs). My doctor told me that it was likely CSF fluid that the incision area and COULD develop into a leak. I was put on a diuretic to keep the CSF pressure down. Little did anyone know, I would have an allergic reaction to the med I was on that ultimately landed me back in the hospital almost 2 months after my surgery..
Just keep an eye on it, like your doctor said.. Make sure there are no other signs of a CSF leak and be sure to let your doctor know about any changes that you notice.
Maggie had the same goose egg thing on her incision area and it did develop into a leak... So, you want to be careful and pay very close attention to it until it goes away..
Regards,
Brian