PR. Per rectum means 'from or through the rectum' and is often followed by the word bleed to describe bleeding from that particular area. Since the rectum is an orifice leading to a body cavity, any bleeding from it must be taken seriously (unless it is nothing more than piles or small blood vessel ruptures caused by straining). A PR bleed can indicate disease (such as cancer) or internal haemorrhage.
Relative term: PV
