Periurethral injection of pyrolyzed teflon are used for control of urinary incontinence. Here a case is reported in which teflonparticles have spread from periurethrally injected teflon to pulmonary tissue. Teflon embolization to the lungs from artificial heart valves has previously been reported. The difference between these two forms of teflon-embolization are discussed. The risk of carcinogenicity is discussed.