First, our sympathy for the grieving you still do for Thor. We lost one ourselves in May so know what you are going through. As for the tumors, I have never heard of anything like you describe, but my experience is limited (we're on our 4th and 5th pyrs respectively). I'll be interested in what others with more knowledge have to say about this. Welcome to the list! Ann, Peg, Ivy Rose and Tori