Joint Department of Medical Imaging, University Health Network, Toronto, ON, Canada.
, 700 University Avenue, 2nd floor north, Toronto, ON, M5G 1X5, Canada.
Abdom Radiol (NY). 2019 Jan;44(1):1-10. doi: 10.1007/s00261-018-1673-2.
Extramural venous invasion (EMVI) is an independent prognostic factor for prediction of overall unfavorable outcomes in rectal cancer. While EMVI has traditionally been detected in postoperative pathologic specimens, MRI can provide this important piece of information preoperatively. This article reviews the methods of EMVI detection and their clinical implications for treatment and outcomes of rectal cancer.
EMVI has fundamental implications for rectal cancer prognosis and long-term outcomes. Since MRI has the advantage of preoperative detection of EMVI, it has been suggested that MRI-detected EMVI be incorporated for preoperative chemoradiotherapy (CRT) treatment stratification of rectal cancer for better patient triage and outcomes.
壁外静脉侵犯（EMVI）是预测直肠癌总体不良预后的独立预后因素。虽然 EMVI 传统上是在术后病理标本中检测到的，但 MRI 可以在术前提供这一重要信息。本文回顾了 EMVI 的检测方法及其对直肠癌治疗和预后的临床意义。
EMVI 对直肠癌的预后和长期结果具有根本意义。由于 MRI 具有术前检测 EMVI 的优势，因此建议将 MRI 检测到的 EMVI 纳入直肠癌术前放化疗（CRT）的治疗分层，以更好地对患者进行分诊和改善预后。
