My brother was diagnosed with glioblastoma almost 4 yr ago. He's had surgery (they can't remove 100%of the tumor) and several bouts of radiation and chemo since then. All things considered, he has done well. But just last week he found out the tumor is growing again. Not sure what comes next but we are all on pins and needles. The avg time a person lives after diagnosis is about 18 mos. so we are lucky he's still here. The dad of one of my daughters friends lived 6 months after he was diagnosed with same thing. It's what Sen. John McCain and Sen. Ted Kennedy had, too. So I understand your worry but if it's not a tumor or anything life threatening, just count your blessings.