Many thanks to all the prompt replies to my query, particularly to Tim Hogan and Mike Hallworth. It is a well-known syndrome - PUBS - Purple Urine Bag Syndrome. Lots of literature on PubMed. Our case is to be presented at our Grand Round this morning. Many thanks Gail Dr Gail Curtis Principal Biochemist Department of Chemical Pathology Ysbyty Glan Clwyd ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/