A Rare Case of Transverse Colonic Cavernous Hemangioma: An Ambiguous Preoperative Diagnosis, An Inappropriate Biopsy, A Fortunate Outcome, One Good Lesson and Some Serious Reflections

Multiphasic CT and MR Imaging Findings of an Isolated Transverse Colon Hemangioma

“…Approximately 80% of colonic hemangiomas are cavernous subtype having relatively circumscribed proliferations of large and often dilated thin-walled vessels or blood-filled sinuses which may contain thrombus (1,3). These features give typically purplish-red to blue surface of the tumor that is soft and compressible on touch on endoscopy (2,4,5). Clinically, 60-90% of the patients with GI tract hemangiomas present with occult or lifethreatening bleeding, while approximately 10% of the patients can be asymptomatic (3,6).…”