Appearance of lymphomatous involvement of the mesentery by ultrasonography and body computed tomography: the "sandwich sign".

Abstract

A characteristic appearance of lymphomatous involvement of the mesentery is demonstrated by ultrasonography and computed tomography. The presence of a lobulated confluent mass infiltrating the mesenteric leaves and encasing the superior mesenteric artery and veins producting a sandwich-like appearance is reported in 7 patients with Hodgkin and non-Hodgkin lymphoma. Retroperitoneal adenopathy was present in all 7 patients. In 6, a correct prospective diagnosis was made and a major revision of therapeutic planning occurred. Laparotomy was deferred in 3 patients. The anatomy, pathophysiology and clinical importance are detailed.