Forgotten catheter transfixing liver and right kidney: a staged surgical approach

A 45-year-old female with recurrent urinary tract infections since adolescence presented with nephrolithiasis, managed by open anatrophic nephrolithotomy in 1997 and percutaneous nephrolithotomy (PCNL) in 2009. In 2018, an MRI incidentally revealed a forgotten catheter transfixing the liver and right kidney, which remained untreated until she experienced worsening of flank pain, hematuria, and pyelonephritis. Upon admission in January 2025, a new CT prompted surgical interventions, including flexible RIRS, PCNL, and laparoscopy for foreign body and calculi removal, with double-J stent placement. This case highlights the importance of proper material counting, imaging control and adequate follow-up to prevent complications.