Pseudotumor, what is it?

Mr. Derek McMinn on Pseudotumors - May 2010 (taken from written interview)

A few centres have reported a phenomenon, which has been named ‘pseudotumors’ by a renowned orthopaedic hospital in Oxford. The term pseudotumor refers to a problem, whereby a hip resurfacing or a metal-on-metal hip replacement fails with a painful swelling or with collection of fluid around the hip joint. The word ‘pseudotumor’ has caused consternation among patients who were worried if this is some kind of a hidden cancer or a pre-cancerous condition. These need to be put into perspective.