We present the case of a 13-year-old girl with a recurrent urinary tract infection, malodorous vaginal discharge, and urinary incontinence caused by a retained vaginal foreign body. The foreign body, an aerosol cap retained for over 2 years, resulted in the formation of a ureterovaginal fistula, an extremely rare complication. The critical value of ultrasound and magnetic resonance urography in delineating the foreign body, the fistulous tract, and the intraperitoneal urine leak is described. Through this unique diagnostic dilemma, we wish to highlight that the evaluation of persistent unusual urinary symptoms and vaginal discharge in a young girl must include a thorough pelvic examination and focused imaging to look for retained vaginal foreign bodies.
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