Angiomatous leiomyoma of the urachus: A rare entity masquerading as extraluminal gastrointestinal stromal tumor

Abstract

The urachus is a vestigial structure located between the dome of the bladder and the umbilicus, which results from the involution of the allantoic duct and the cloaca. Persistence of an embryonic urachal remnant can cause various problems during childhood and young adulthood. Urachal leiomyoma is a rare entity with very few cases being reported in literature. It can be misdiagnosed and confused with a wide spectrum of intra-abdominal or pelvic disorders. We hereby report a case of angiomatous leiomyoma originating from the urachal remnant in a 45-year-old lady, masquerading as extraluminal gastrointestinal stromal tumor. Understanding the embryological basis of these urachal disorders and their imaging features coupled with histopathological examination is crucial for the correct diagnosis and management. Pathological diagnosis is required to optimize the surgical approach and preclude unnecessary radical surgery.

Unerwartete Differentialdiagnose eines Urachuskarzinoms

“…Dieses findet sich in 95% der Fälle als uterines Leiomyom, außerhalb des Uterus sind Leiomyome am häufigsten gastrointestinal und kutan beschrieben [1]. Ein Leiomyom des Urachus wurde bisher erst in 6 weiteren Fällen, zuletzt in Australien als Kongressbericht beschrieben [2][3][4][5][6][7]. Leiomyome sind im Urogenitaltrakt insgesamt selten und bisher erst in ca.…”