Answer
**• Acute ureteric obstruction (other causes)
– UPJ obstruction
– Sloughed papilla
– Clot colic from gross hematuria
• Pyelonephritis (fever, pyuria, flank pain) without a stone
• Acute abdominal crisis: appendicitis, diverticulitis, biliary colic, bowel obstruction, pancreatitis
• Ruptured abdominal aortic aneurysm (AAA)
• Gynecological: ectopic pregnancy, torsion / rupture of ovarian cyst
• Radiculitis (L1) – herpes zoster, nerve root compression**