Scientists reported Wednesday they have for the first time detected a suspected carcinogen in the urine of a woman with a polyurethane-coated silicone breast implant.

Researcher Siu Chan and his colleagues at the Foothills Hospital in Calgary, Canada, said they detected chemicals called toluenediamines, or TDAs, in the urine of a 41-year-old woman who had a breast implant known as Meme implant.Surgitek of Racine, Wis., a subsidiary of Bristol-Myers Squibb of New York, which makes the implant, suspended shipment of polyurethane implants in April pending a Food and Drug Administration investigation into safety questions about the devices.