A 57-year-old Canadian male patient residing in Hua Hin, Prachuap Khiri Khan, has a kidney stone in his left kidney. He underwent two sessions of shock wave lithotripsy (ESWL), but they were unsuccessful. Surgery is now required to remove the stone. With recent medical advancements, the stone can be removed using a procedure called Retrograde Intrarenal Surgery (RIRS). In this procedure, a flexible ureteroscope is inserted through the urinary tract to the kidney, allowing the surgeon to locate the stone and break it up with a laser. The fragments are then extracted through the urinary tract using a stent. This procedure is minimally invasive, with no incisions, and the patient only needs to stay in the hospital for one day post-surgery. The procedure was performed by Dr. Piyapong Wongjittraporn, a urologist.