<prompt> Locate the renal stone with pain radiating to medial side of thigh and perineum due to slipping of stone in males ?At pelvic brimIntramural opening of ureterJunction of ureter and renal pelvisAt crossing of gonadal vessels and ureter  <response>: Ans is a ie at pelvic brim The clinician is able to judge the position of the stone by the history of pain - Position of stone Site of Pain At PUJ or upper ureter Pain radiates to the testicles At middle of the ureter ie at crossing of gonadal vessels and ureter Pain is referred to Mc Burneys point on the right side resembling appendicitis and on left side simulates diveiculitis. At lower ureter or at pelvic brim Pain is referred to inner side of thigh, groin In the intramural ureter Strangury painful fruitless desire to micturate 