Abstract：
Magnetic resonance imaging (MRI) is an integral part of the evaluation of local and regional disease in tongue squamous cell carcinoma prior to surgery. The aim of this study was to evaluate the accuracy of MRI in assessing tumour dimensions, as well as the impact of the time-lag from diagnostic biopsy on the accuracy of MRI. The medical records of 64 patients with tongue carcinoma were reviewed retrospectively. Tumour maximum diameter and tumour depth of invasion were compared between pathology and MRI (T1- and T2-weighted). MRI-derived maximum tumour diameter and depth of invasion correlated strongly with histopathology: T1-weighted (r = 0.700 and r = 0.813, respectively) and T2-weighted (r = 0.734 and r = 0.834, respectively). A significant correlation was found between measurements on T1 and T2 MRI for both parameters (P = 0.955 and P = 0.984, respectively). The accuracy rate of MRI for T-staging of early tumours was low: 10% for T1 tumours; 39.3% for T2 tumours. A time-lag of less than 2 weeks between the diagnostic biopsy and MRI adversely affected the correlation of tumour dimensions. MRI is a reliable tool for evaluating tongue carcinoma; however, it overestimates early tumours. A 2-week delay after diagnostic biopsy is desired before completing an MRI. Alternatively, if logistics allow, a pre-biopsy MRI is preferred, especially for T1-T2 tumours.
摘要：
磁共振成像（MRI）是手术前评估舌鳞状细胞癌局部和区域疾病的组成部分。这项研究的目的是评估MRI评估肿瘤尺寸的准确性。以及诊断活检的时滞对MRI准确性的影响。回顾性分析了64例舌癌患者的病历。在病理学和MRI（T1和T2加权）之间比较了肿瘤最大直径和肿瘤浸润深度。MRI得出的最大肿瘤直径和浸润深度与组织病理学密切相关：T1加权（分别为r=0.700和r=0.813）和T2加权（分别为r=0.734和r=0.834）。在两个参数的T1和T2MRI测量之间发现了显着相关性（分别为P=0.955和P=0.984）。MRI对早期肿瘤T分期的准确率较低：T1肿瘤为10％；T2肿瘤为39.3％。诊断活检和MRI之间少于2周的时间滞后会对肿瘤尺寸的相关性产生不利影响。MRI是评估舌癌的可靠工具；然而，它高估了早期肿瘤。在完成MRI之前，需要在诊断性活检后延迟2周。或者，如果物流允许，活检前的MRI是首选，特别是T1-T2肿瘤。
