We report a case of an unusual foreign body in the urinary bladder. A 66-year-old male had undergone an operation of rectal cancer 6 years previously. He visited our hospital with irritative urinary symptoms. Urinalysis showed hematopyuria, and X-ray examination revealed a curved fine shadow (about 2 cm in length and 3 mm in width) at the vesical region. In cystoscopic examination, a calcified surgical suture needle was identified on the trigonal region. The needle was removed transurethrally by a stone crushing forceps. Thus, it was assumed that the needle had been left in the abdominal cavity at the operation 6 years ago and it had migrated into the bladder during these 6 years. Many cases of foreign bodies in the urinary bladder have been reported. However, to our knowledge, this is the first report of a surgical suture needle, in the bladder.
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