I am fairly new to this message board. I have never heard anyone mention having Tall Cell (I do). Does it affect your treatment program or prognosis? I don't think it's very common and it scares me. I know this sounds dumb...but I'm afraid to investigate it on the internet. This is my 4th experience with cancer (first-time for thyroid). I am on RID--waiting for Thyrogen/RAI/WBS. Thank you. Good luck to everyone out there.