ive had a surgery done for pleomorphic adenoma somewhere in 1997, undergone chemo n radio. after a while, been okay..however had bad neuroma episodes. now there s a mild pain somewhere in my mid-skull and a circular dent [of about 2 wide and the centre is becoming deeper]. when i touch it or press it out of curiosity, it triggers a mild, shooting pain. please advise. tq v.much