磁共振弥散加权成像在直肠癌淋巴结转移评估中的价值综述

随着生活水平的提高,直肠癌在我国的发病率明显提高[1],随之而来的是对诊疗水平要求的提升。据国内外多项研究表明,直肠癌患者是否伴淋巴结转移,是否进行术前辅助放化疗、手术方式及范围的选择,是否进行术后放疗,局部复发率以及远端转移率等密切相关,是一项重要的影响预后的因素[2]。而常规的成像方式对淋巴结状态的评估差强人意[3]。目前磁共振成像在直肠癌的淋巴结状态判断方面日益受到重视。本文就其在直肠癌淋巴结转移中应用及展望进行综述。

The Utilization of Diffusion-weighted Magnetic Resonance Imaging in the Detection of Lymph-node Metastasis in Rectal Cancer

The incidence of rectal cancer has been increasing in China, which lays much pressure on doctors for more accurate diagnosis and treatment. Nodal involvement in rectal cancer is a poor prognostic factor for local and distant recurrence and is generally considered as an important indication for neoadjuvant chemoradiotherapy before surgery or radiotherapy after surgery in patients. A positive nodal status will therefore influence the outcome of treatment. Magnetic resonance imaging （MRI） is now being widely used in TNM staging of rectal cancer; however conventional imaging methods are not satisfactory in the assessment of nodal status. This is a review on the utilization of MR diffusion-weighted imaging in the evaluation of nodal status in rectal cancer.