Percutaneous nephrostomy is a medical procedure that involves inserting a catheter through the skin into the kidney to drain urine. This procedure can be used to treat a variety of conditions, such as kidney stones or tumors. There are several synonyms for percutaneous nephrostomy, including percutaneous nephropyelostomy, percutaneous renal access, and percutaneous nephrostolithotomy. These terms all refer to the same procedure and are used interchangeably in medical literature. While the term percutaneous nephrostomy is the most commonly used term, physicians may use one of these synonyms to describe the procedure based on their preference or familiarity with the term.