Mesenteric and omental cysts: histologic classification with imaging correlation.

Abstract

Forty-one cases of mesenteric and omental cysts are reported. Histologically, several specific types could be distinguished: lymphangioma, 19 cases; nonpancreatic pseudocyst, 11 cases; enteric duplication cyst, six cases; mesothelial cyst, three cases; and enteric cyst, two cases. A lymphangioma is usually a multiloculated cyst located in the mesentery that shows no discernible wall on computed tomography (CT) and may have characteristics of fat on CT and magnetic resonance imaging. Abnormalities in the small bowel mucosa were frequently noted on barium studies. A nonpancreatic pseudocyst is usually a unilocular or multilocular cyst located in either the mesentery or the omentum, with abundant debris sonographically and an enhancing wall on CT. An enteric duplication cyst is a unilocular cyst with an enhancing wall on CT. Mesothelial and enteric cysts are anechoic, thin-walled cysts. Emphasis is placed on the importance of identifying lymphangioma, which is more difficult to manage than the other forms of mesenteric and omental cysts.

Retroperitoneal lymphangioma: A report of 2 cases and a review of the literature regarding the differential diagnoses of retroperitoneal cystic masses

“…The retroperitoneal region is a rare localization of cystic lymphangiomas, however, it should be included in the differential diagnosis of cystic lesions (Tables I-III) (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33). The recommended treatment for retroperitoneal cystic masses is complete surgical excision, as a partial resection is associated with increased rates of recurrence.…”

Greater and Lesser Omenta: Normal Anatomy and Pathologic Processes

“…Both malignant and benign tumors can appear complex, with cystic and solid elements. Some cystic lesions may involve the greater omentum, including cystic lymphangioma, enteric duplication cyst, enteric cyst, mesothelial cyst, and nonpancreatic pseudocyst (17). Abdominal lymphangioma is characterized by a uni-or multiloculated fluid-filled mass with a thin wall and occasionally with septa (Fig 10) (17,18).…”

Giant abdominal mesenteric cyst

“…Most commonly observed ones are with lymphatic and mesothelial origin (2,8). However, rarity of mesenteric cysts in general causes deficiens of information on classification and difficulties (2).…”