[Endoscopic Ultrasound-guided Biliary Drainage]

Comparison of the Diagnostic Performances of Same-session Endoscopic Ultrasound- and Endoscopic Retrograde Cholangiopancreatography-guided Tissue Sampling for Suspected Biliary Strictures at Different Primary Tumor Sites

Background/Aims

Determining the cause of suspected biliary stricture is often challenging in clinical practice. We aimed to compare the diagnostic yields of endoscopic ultrasound-guided tissue sampling (EUS-TS) and endoscopic retrograde cholangiopancreatography-guided tissue sampling (ERCP-TS) in patients with suspected biliary stricture at different primary lesions.

Methods

We enrolled patients who underwent same-session EUS- and ERCP-TS for the evaluation of suspected biliary stricture. Forceps biopsy and/or brush cytology of intraductal lesions and fine-needle aspiration for solid mass lesions were performed during ERCP and EUS, respectively.

Results

One hundred and twenty-five patients treated at our institution between January 2011 and September 2016, were initially considered for the study. However, 32 patients were excluded due to loss of follow-up (n=8) and ERCP-TS on the pancreatic duct (n=20) or periampullary lesions (n=4). Of the 93 patients included, 86 had a malignant tumor including cholangiocarcinoma (n=39), pancreatic cancer (n=37), and other malignancies (n=10). Seven patients had benign lesions. EUS-TS had higher rate of overall diagnostic accuracy than ERCP-TS (82.8% vs. 60.2%, p=0.001), and this was especially true for patients with a pancreatic lesion (84.4% vs. 51.1%, p=0.003).

Conclusions

EUS-TS was found to be superior to ERCP-TS for evaluating suspected biliary strictures, especially those caused by pancreatic lesions.

肝外胆管梗阻的支架治疗研究进展

胆管支架治疗肝外胆管梗阻已经是当前内镜下治疗的研究热点. 肝外胆管梗阻的常见病因有: 胆管结石、胆管慢性炎症狭窄、胆管恶性肿瘤、壶腹部肿瘤、肝门部胆管癌、慢性胰腺炎、胰头癌等. 胆管支架治疗可以是恶性肿瘤的姑息性退黄治疗, 也可以是外科手术前的暂时性退黄治疗或不宜手术患者的对症治疗. 但是关于胆管支架治疗肝外梗阻目前国内未有一致意见的报道, 统一标准的缺失使得临床的诊治工作仍面临重大的挑战.