A hemangioma of the sigmoid colon mesentery presenting as a retroperitonealtumor: a case report and review

Abstract

Hemangiomas of the gastrointestinal tract and mesentery are uncommon benign vascular lesions. While spontaneous bleeding is the hallmark of the gastrointestinal tumor variant, clinical signs of mesenteric hemangiomas are mostly unspecific. Despite the increasing imaging quality of computerized tomography (CT), in most cases the final diagnosis is established through surgery and histopathologic analysis of a macrobiopsy.We present a case report of a 20-year-old female patient who was admitted with progressive abdominal distension and suffered from persistent abdominal pain for 3 months. A large retroperitoneal tumor mass was detected on the CT scan. Due to radiographic signs of an intraabdominal liposarcoma, an explorative laparotomy was performed revealing a large hemangioma originating from the mesosigmoid.Although rare, gastrointestinal hemangiomas should be kept in mind by oncological visceral surgeons as one differential diagnosis of large intraabdominal tumorous masses, especially in young adults.

Cavernous hemangioma of the mesorectum involving the rectum: A rare case report

“…Calci cations were seen scattered throughout the lesion on CT. Some studies suggested that this was due to degenerative changes as a consequence of the thrombosis within the sinuses, caused by perivascular in ammation and stasis of blood ow (4,11). Other studies have shown that calci cations may ultimately form phleboliths, which represent an important diagnostic feature, seen in 26 to 50% of affected adult patients (4).…”

“…Some studies suggested that this was due to degenerative changes as a consequence of the thrombosis within the sinuses, caused by perivascular in ammation and stasis of blood ow (4,11). Other studies have shown that calci cations may ultimately form phleboliths, which represent an important diagnostic feature, seen in 26 to 50% of affected adult patients (4). Phleboliths are usually signal voided on both Tl and T2 weighted images, and thrombosed vessels show serpiginous structures with high signal intensity on MRI (11).…”

“…Degenerative changes, such as brosis, result in a heterogeneous signal intensity on T2-weighted images. Intratumoral hemorrhage may show hypointense signal on T2-weighted images, making hemangiomas hard to differentiate from other solid mesenchymal tumors, such as bromas or leiomyomas (4). Characteristic discontinuous peripheral nodular progressive enhancement patterns can be seen in some mesenteric hemangiomas.…”

“…The presence of multiple hemangiomas or those that extensively involve an organ or body part are termed hemangiomatosis (2). Hemangiomas in the gastrointestinal system are very rare, accounting for only 0.05% of intestinal tumors (3,4) and are even rarer in the mesentery; fewer than twenty have been reported.…”

A rare case of an asymptomatic mesenteric hemangioma: an incidental finding

“…1 In the gastrointestinal tract, hemangiomas only comprise 5-10% of benign tumors with equal distribution between the jejunum and ileum, followed by the large intestine, and stomach. [2][3][4][5] Duodenal hemangiomas are even more rare. More specifically, since 1839, approximately 200 cases of gastrointestinal hemangiomas have been reported with only 15 of those cases involving the mesentery.…”