[What nobody thought possible--a "demobilization chain" gone astray. Foreign body in the urinary bladder--a current differential diagnosis].
Intravesical foreign bodies should be considered in cases of unexplainable lower urinary tract symptoms or recurrent urinary tract infections with therapy-resistant microbes like Proteus mirabilis and Pseudomonas. Usually these conditions are due to accidents in genitourinary surgery or instrumentation, but in our case occurred as a complication to an erotic procedure. This paper describes a case with a so-called "dimme-lenke", i.e. a chain used to count down days until demobilization from compulsory military service for Norwegian recruits, found in the bladder of a 13-year-old boy. A knot at the end of the chain made endoscopic removal impossible and it had to be removed by cystotomy.