5 Key Takeaways

• 1

  A 77-year-old woman with chronic lower back pain and no urinary symptoms had right hydronephrosis and hydroureter extending to the sacroiliac joint.

• 2

  CT showed ureteral adherence and abrupt narrowing at the right sacroiliac joint, where advanced degenerative changes were more pronounced on the right.

• 3

  The authors attributed the obstruction to nontraumatic ureteral entrapment from chronic degenerative sacroiliitis, with markedly delayed contrast excretion.

• 4

  The patient was managed conservatively, and ultrasonography at 3 months showed no significant progression of hydronephrosis.

• 5

  The authors noted that the single case, absent renal functional scan, and limited follow-up restrict conclusions about long-term renal outcomes.