From
eMailWire:
Patients who have been implanted with the recalled ASR systems may be at risk for DePuy metal poisoning due to the metal-on-metal design of the system. As the components rub against each other, they can release
cobalt and chromium into the body. Some individuals may develop an inflammatory reaction to these metal particles, causing fluid build-up in the joint and its surrounding tissue. Initially, DePuy hip metal poisoning may be painless; however, left untreated, it can damage the muscles, bones and nerves around the hip.