横结肠系膜是腹腔内的重要解剖结构,随着CT、MRI的临床应用,得以直观显示其正常走行、分布及其病变。横结肠系膜不但自身可发生病变,而且全身性病变、邻近脏器的病变和远距离转移的病变均可累及横结肠系膜。因此,发现和明确横结肠系膜病变,对病变的性质和肿瘤分级有重要意义。 Transverse mesocolon is an intraperitoneal important anatomical structure, with the clinical application of CT, MRI, to visualize its normal walking, distribution and lesions. Transverse mesocolon not only its own lesions can occur, and systemic lesions, lesions of the adjacent organs and distant metastases lesions can affect the transverse mesocolon. Therefore, to find and clear transverse mesenteric lesions, the nature of the lesion and tumor grade is of great significance.