Gastric Cancer Angiogenesis Assessment by Dynamic Contrast Harmonic Imaging Endoscopic Ultrasound (CHI-EUS) and Immunohistochemical Analysis-A Feasibility Study

Tumor vascular perfusion pattern in gastric cancer (GC) may be an important prognostic factor with therapeutic implications. Non-invasive methods such as dynamic contrast harmonic imaging endoscopic ultrasound (CHI-EUS) may provide details about tumor perfusion and could also lay out another perspective for angiogenesis assessment. Methods: We included 34 patients with GC, adenocarcinoma, with CHI-EUS examinations that were performed before any treatment decision. We analyzed eighty video sequences with a dedicated software for quantitative analysis of the vascular patterns of specific regions of interest (ROI). As a result, time-intensity curve (TIC) along with other derived parameters were automatically generated: peak enhancement (PE), rise time (RT), time to peak (TTP), wash-in perfusion index (WiPI), ROI area, and others. We performed CD105 and CD31 immunostaining to calculate the vascular diameter (vd) and the microvascular density (MVD), and the results were compared with CHI-EUS parameters. Results: High statistical correlations (p < 0.05) were observed between TIC analysis parameters MVD and vd CD31. Strong correlations were also found between tumor grade and 7 CHI-EUS parameters, p < 0.005. Conclusions: GC angiogenesis assessment by CHI-EUS is feasible and may be considered for future studies based on TIC analysis.

Retrieval anchor-assisted endoscopic ultrasound-guided gastroenterostomy for gastric outlet obstruction

OBJECTIVES

Endoscopic ultrasound-guided gastroenterostomy (EUS-GE) is an emerging procedure for gastric outlet obstruction (GOO) as an alternative to endoscopic stent placement in the duodenum or surgery; however, it is technically challenging. This study aimed to evaluate the safety, success rate, and adverse events rate associated with retrieval anchor-assisted EUS-GE.

METHODS

Data from patients who underwent retrieval anchor-assisted EUS-GE for malignant and benign GOO were retrospectively analyzed. Patients' clinical and demographic characteristics, procedure time, and success and adverse event rates were recorded.

RESULTS

A total of 10 patients (6 females; mean age 63.2 ± 5.8 years) were included in our study. Nine cases were malignant and one case was benign GOO. Nine patients received retrievable anchor-assisted EUS-GE for GOO. One patient received retrievable anchor-assisted EUS-GE and concurrent EUS-guided hepatogastrostomy due to the biliary obstruction. There were no complications during any of the procedures. The rate of technical and clinical success was 100%.

CONCLUSIONS

EUS-GE is a safe and effective procedure for GOO. The retrieval anchor can make EUS-GE easier to perform successfully.

Clinical Review of EUS-guided Gastroenterostomy (EUS-GE)

Gastric outlet obstruction (GOO) refers to mechanical obstruction of the distal stomach or proximal duodenum and it is associated with a significant decrease in quality of life. Surgical gastrojejunostomy and self-expandable metal stents were the traditional treatment for GOO. Recently, endoscopic ultrasound guided gastroenterostomy (EUS-GE) has emerged as a third therapeutic option for patients with GOO. Most EUS-GE techniques utilize the placement of a lumen-apposing metal stent under echoendoscopy but differ in the method of localizing the jejunal loop prior to EUS puncture. Data supporting EUS-GE have been promising. Case series including 10 or more cases showed the technical success rate to be approximately 90%. Clinical success is achieved in approximately 85-90% and a less than 18% risk of adverse events is reported. EUS-GE was associated with a lower recurrence of GOO and need for re-intervention when compared to enteral stenting. In addition, EUS-GE shows significantly fewer adverse events compared with surgical gastrojejunostomy. In conclusion, EUS-GE provides symptom relief without the risks of surgical intervention and the limited patency of enteral SEMS placement. EUS-GE is an exciting new option in the management of GOO. Despite the excellent results, randomized studies comparing these different modalities of treatment for GOO are needed before EUS-GE can be accepted as standard of care.

Durability and long-term outcomes of direct EUS-guided gastroenterostomy using lumen-apposing metal stents for gastric outlet obstruction

Background and study aims  EUS-guided gastroenterostomy (GE) is a novel, minimally invasive endoscopic procedure for the treatment of gastric outlet obstruction (GOO). The direct-EUS-GE (D-GE) approach has recently gained traction. We aimed to report on a large cohort of patients who underwent DGE with focus on long-term outcomes. Patients and methods  This two-center, retrospective study involved consecutive patients who underwent D-GE between October 2014 and May 2018. The primary outcomes were technical and clinical success. Secondary outcomes were adverse events (AEs), rate of reintervention, procedure time, time to resume oral diet, and post-procedure length of stay (LOS). Results  A total of 57 patients (50.9 % female; median age 65 years) underwent D-GE for GOO. The etiology was malignant in 84.2 % and benign in 15.8 %. Technical success and clinical success were achieved in 93 % and 89.5 % of patients, respectively, with a median follow-up of 196 days in malignant GOO and 319.5 days in benign GOO. There were 2 (3.5 %) AEs, one severe and one moderate. Median procedure time was 39 minutes (IQR, 26 - 51.5 minutes). Median time to resume oral diet after D-GE was 1 day (IQR 1 - 2 days). Median post D-GE LOS was 3 days (IQR 2 - 7 days). Rate of reintervention was 15.1 %. Conclusions  D-GE is safe and effective in management of both malignant and benign causes of GOO. Clinical success with D-GE is durable with a low rate of reintervention based on a long-term cohort.

Endoscopic ultrasound-guided choledochoduodenostomy using a lumen apposing metal stent for acute cholangitis

We present the case of a 51-year-old woman with a history of uterine cancer who presented to the emergency room with a clinical picture of acute cholangitis. An abdominal ultrasound and a computed tomography scan were performed, revealing a gigantic lymphadenopathy mass compressing the common bile duct and the duodenum. After failure to perform an endoscopic retrograde cholangiopancreatography (ERCP) due to a modified anatomy, we performed an endoscopic ultrasound-guided choledochoduodenostomy (EUS-CDS) and placed a Hot AXIOS 10Fr/10 mm stent with efficient biliary drainage. In addition, we inserted a duodenal uncoated 120/22 mm expandable metallic stent. EUS-CDS presents a valid alternative in patients with failed ERCP and should be considered as an important option for rapid biliary decompression in patients with acute cholangitis.