European Radiology:CT腹部脂肪组织定量对直肠癌患者手术和肿瘤预后的价值

2022-08-07 shaosai MedSci原创

研究表明,肥胖和结肠直肠癌密切相关,其不仅与结直肠癌的发生有关,还会导致更多术后并发症的发生。

统计结直肠癌全世界范围内第三大最常的恶性肿瘤,也是全世界癌症死亡的第四大原因。研究表明肥胖和结肠直肠癌密切相关,其不仅与结直肠癌的发生有关,还会导致更多术后并发症发生

研究发现内脏脂肪区(VFA)和皮下脂肪区(SFA)的脂肪组织之间存在显著的差异。内脏脂肪组织有更多的细胞和神经,含有大量的炎症和免疫细胞以及更多的糖皮质激素和雄激素受体,因此比皮下脂肪组织的代谢更活跃。

内脏型肥胖是指内脏脂肪在腹腔内过度堆积。目前还没有根据年龄和性别确定的内脏脂肪量的标准值。通过常规的成像技术,如计算机断层扫描(CT)可以评估身体脂肪的定量和分布。这种成像方式是作为标准病人护理路径的一部分获得的,从肿瘤分期到反应评估和监测,因此为临床提供了一个将脂肪组织测量纳入目前的病人护理的理想机会。

近日,发表在European Radiology杂志的一项研究探讨了使用CT扫描评估的脂肪组织测量和分布与接受癌症直肠切除术患者的手术和肿瘤学预后之间的关联,并找到相关的证据,为进一步的治疗反映评估和检测提供了参考依据。

本研究纳入了2006年至2016年间接受直肠癌切除手术的患者进入研究。在术前CT中评估了CT脂肪面积的测量,并与术后预后(局部和全身并发症)、长期生存和肿瘤学反应进行了比较。 

在纳入的202名患者中,50人(25%)死亡,中位生存时间为34个月,152人(75%)在研究结束时仍然存活。死亡和疾病进展与L4-L5水平的高肌间/皮下脂肪比率明显相关,截断值确定为0.12(P < 0.05)。在L2-L3水平的皮下/内脏脂肪比率低(<1.15)的患者局部并发症的发生率明显增高(P <0.05)。 


 a 术前CT扫描的矢状图。b 同一患者的L3水平的轴位层面。进行了半自动的皮下脂肪区(蓝色)和内脏脂肪区(绿色)的划分。c 红色的半自动肌肉间脂肪区划线。蓝色区域代表用于测量脂肪体积的划线(c总体积,从心脏下缘到S1上缘,(d)标准腹部体积,从头顶到S1上缘12厘米)。 e 肾静脉水平的轴位层面。肾周脂肪厚度(PNF)被定义为肾脏和腹壁之间的最大距离

本研究表明,在影像学报告中加入腹部脂肪的定量和分布数据可以协助外科医生预测直肠癌手术的效果和肿瘤预后。

原文出处:

Benoît Pacquelet,Remy Morello,Jean-Pierre Pelage,et al.Abdominal adipose tissue quantification and distribution with CT: prognostic value for surgical and oncological outcome in patients with rectal cancer.DOI:10.1007/s00330-022-08697-4

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