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Updated: Aug 14, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
Published on: October 12, 2017
Unusual cause of obstructive uropathy
Pedram Ilbeigi1, Salvatore Lombardo, Hossein Sadeghi-Nejad
1Department of Surgery, UMDNJ- New Jersey Medical School, Newark, NJ 07601, USA.
Abstract:
We report a case involving a 55-year-old healthy man that presented with urinary retention and a lower abdominal mass. His evaluation revealed a large mucocele arising from the appendix that caused severe bilateral ureteral obstruction and renal failure. Appendiceal mucoceles are rare and insidious entities that can present with urologic manifestation. Despite their rarity, this case highlights the importance of including mucoceles in the differential diagnosis in cases involving ureteral obstruction caused by external compression.
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