No I dont have one but they just found one in my cousin's brain. Its benign at the moment so I guess its not a big deal but still usually brain tumor means something bad. I dont know much about cancer as I have never known anyone with it. I guess what I want to know is if he starts smoking or better yet vaping weed on a regualar basis could it help with keeping it from going malignant and possibly spreading? I have heard of research suggesting that cannabis helps stop cancerous cells from spreading. Im just really bummed out because we are so close and it seems I cant do a damn thing for him and its killing me. Any help of course is appreciated.