Locate the renal stone with pain radiating to medial side of thigh and perineum due to slipping of stone in males:
At pelvic brim
Intramural opening of ureter
Junction of ureter and renal pelvis
At crossing of gonadal vessels and ureter
Answer is A (At pelvic brim): Pain radiating to medial side of thitth and perineum suggetsts a stone in lower poion of ureter (proximal to orifice) or at pelvic brim.