European Radiology:多参数MRI评估口腔舌鳞状细胞癌的肿瘤浸润深度

2021-11-18 shaosai MedSci原创

口腔鳞状细胞癌是全球第八大常见癌症,大多发生在舌前2/3处。口腔舌鳞癌(OTSCC)由于存在发达的淋巴血管系统并缺乏阻止肿瘤繁殖的强大屏障,因此预后较差。

口腔鳞状细胞癌是全球第八大常见癌症,大多发生在舌前2/3处。口腔舌鳞癌(OTSCC)由于存在发达的淋巴血管系统缺乏阻止肿瘤繁殖的强大屏障,因此预后较差。因此,OTSCC术前需要进行肿瘤边缘的评估,并进行相对广泛的局部切除以减少复发。

侵袭深度(DOI)定义为从粘膜表面或基底膜到最深的侵袭水平的距离,对于临床获得足够深的无癌边缘至关重要。根据美国癌症联合委员会(AJCC)第八版分期手册,建议将口腔癌的组织病理学DOI大于5mm和10mm作为T分期的黄金标准阈值。因此,癌症的T分期和治疗方案会因为DOI评估的毫米级误差而改变。

由于其出色的软组织分辨率,磁共振成像(MRI)被广泛用于评估OTSCC的临床DOI。然而,由于瘤周水肿或炎症,MRI得出的DOI常常大于组织病理学DOI,这可能导致临床T分期被高估。现阶段关于哪种MRI序列适合于DOI的测量目前还没有达成共识

近日,发表在European Radiology杂志的一项研究评估和比较多种MRI序列在估计OTSCC的DOI方面的准确性,以明确临床DOI评估的最佳序列同时确定了最佳截基于MRI的T分期标准建立临床适用的OTSCC的T分期

本研究共回顾性分析了122名口腔舌鳞状细胞癌(OTSCC)患者,接受了术前MRI扫描和手术切除。分别将脂肪抑制T2加权成像(T2WI)、弥散加权成像(DWI)、动态增强T1高分辨率各向异性容积扫描(e-THRIVE)和对比增强脂肪抑制T1WI(CE-T1WI)测得的DOIs与病理标本中测得的DOIs进行了比较。确定了最佳相关的MRI序列的截值,并评估了MRI衍生的DOI的T分期准确性。 

来自e-HRIVE的DOI与病理DOI显示出最佳的相关性(r = 0.936,p < 0.001)。MRI衍生的DOI鉴别T1期和T2期以及鉴别T2期和T3期的曲线下面积值分别为0.969和0.974。MRI衍生的DOI的T分期标准为6.2毫米和11.4毫米,与病理DOI标准的5毫米和10毫米相比,分期准确率为86.9%。 

 

 55岁患者,舌头右缘OTSCC。病理DOI为7.0mm。在T2WI、DWI、e-HRIVE和CE T1WI上测量的DOI分别为15.0 mm、8.1 mm、8.6 mm和15.6 mm。a T2WI上DOI测量示意图。 b 在ADC图上,肿瘤显示低信号(白星),水肿显示高信号(黑星)。d 肿瘤和周围水肿在增强T1WI上均表现为高强化。

项研究表明,e-HRIVE衍生的DOI与病理DOI之间的相关性最高。对于MRI衍生的DOI,早期e-HRIVE测量是OTSCC T分期中最佳的评估方法。本研究的ROC曲线显示,MRI测量的侵袭深度6.2毫米和11.4毫米作为OTSCC的分期标准效果较好诊断准确性为86.9%。

原文出处

Weiqing Tang,Ying Wang,Ying Yuan,et al.Assessment of tumor depth in oral tongue squamous cell carcinoma with multiparametric MRI: correlation with pathology.DOI:10.1007/s00330-021-08148-6

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    2022-07-03 feather89
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