Grenier N, Granger N, Dorcier F, Laurent F, Guibert J L, Richard O, Broussin J
J Radiol. 1987 Jan;68(1):13-21.
The lesser omentum is a peritoneal partition that can be divided into two portions: superior or gastrohepatic ligament and inferior or duodenohepatic ligament, although differentiation is sometimes difficult. Ultrasound and CT scan imaging allowed perfect definition of vascular and glandular elements contained in the omentum, and normal morphology is described. Masses developing between the two leaves of which it is constituted usually project in front of adjacent vascular structures and/or prolonged into the liver hilum, and a fatty layer separates them from large prevertebral vessels. These different guidelines allow them to be distinguished from retroperitoneal celiomesenteric adenopathies. These expansive processes are almost always of glandular origin secondary to primary digestive, retroperitoneal, pelvic and even bronchial tumors. In contrast, primary tumors are rare in this region.
小网膜是一种腹膜分隔，可分为两部分：上部的肝胃韧带和下部的肝十二指肠韧带，不过有时难以区分。超声和CT扫描成像能够清晰界定小网膜内包含的血管和腺体成分，并描述了其正常形态。在构成小网膜的两层之间形成的肿块通常突出于相邻血管结构前方和/或延伸至肝门，并且有一层脂肪将它们与大的椎体前血管分隔开。这些不同的特征有助于将它们与腹膜后腹腔肠系膜淋巴结肿大区分开来。这些扩展性病变几乎总是继发于原发性消化、腹膜后、盆腔甚至支气管肿瘤的腺源性病变。相比之下，该区域的原发性肿瘤很少见。
