Kidney and Ureter Relations

Which feature best distinguishes the abdominal ureter from the pelvic ureter in terms of their relationship to major vascular structures?

Which of the following structures forms the anterior boundary of the renal hilum?

What is the most common site of ureteric obstruction in both males and females?

At what vertebral level does the ureter typically cross the iliac bifurcation?

A 32-year-old man from Delhi presents to the emergency department with acute left flank pain radiating to the groin and haematuria. Non-contrast CT (NCCT) abdomen shows a 6 mm stone in the left ureter at the level of the pelvic brim. Renal function is normal, and there is no fever. What is the most appropriate immediate management?