Hello Karen @pejiota4jack, I just read your different posts. I had a cavernoma in May 2017, as it was liquid blood, it was removed by biopsy (without surgery). However, a year later, a brain tumor (nonoperable) appeared in the same place. My tumor, central, is located at the 3rd ventricle, behind the eyes. I am treated in chemotherapy, which controls growth for the moment. Like you, the tumor is still there. My neuro-oncologist might also want to treat me with gamma knife. We are still lucky to benefit from this advanced technology. Do you have any information to share on gamma knife? Also, I thought we were doing gamma knife only once. Did you have several treatments? Have you had any negative side effects? How's it going? Thank you for your help.