How long for biopsy results after colonoscopy?

Hi. 

I posted the below message last night but only got a couple of replies. I'm worrying myself sick and feel that we've been left without information. Perhaps people can tell me how long we should expect to wait for the biopsy results? From what I can understand from Googling this growth is really big and I'm panicking. Thanks for any replies.

Previous post below 

I'm struggling to know what to think. My partner has been having trouble with his bowel movements for ages. 3 weeks ago I convinced him to phone the doctor and today he finally had a colonoscopy and a large 10cm growth was found in the very bottom part of the bowel (presumably anal canal and rectum) it is protruding on the outside. The doctor has not given any indication of prognosis but has taken biopsy samples to check for cancer and referred for CAT and MRI scans. Does anybody know if a growth/tumor like this can be non-cancerous? I just want to prepare myself for the likely outcome.

Any information or advice would be very gratefully received.