Noun
nephrolithotomy (plural nephrolithotomies)
(surgery) The removal of a renal calculus by incision into the kidney
Struvite stones can grow rapidly, forming large calyceal staghorn calculi that can require invasive surgery such as percutaneous nephrolithotomy or even anatrophic nephrolithotomy for definitive treatment. Source: Internet
More recently, flexible ureteroscopy has been adapted to facilitate retrograde nephrostomy creation for percutaneous nephrolithotomy. Source: Internet