Diagnostic and therapeutic single-operator cholangiopancreatoscopy with SpyGlassDS™: results of a multicenter retrospective cohort study

BACKGROUND AND AIMS

The aim of the study was to evaluate the usefulness and diagnostic and therapeutic outcome of the single-operator cholangiopancreatoscopy (SOC) with SpyGlassDS™.

METHODS

In a retrospective multicenter study between November 2015 and January 2017, SpyGlassDS™ procedures were analyzed in participating centers. Indications, accuracy of SOC-guided biopsies, management of large bile duct stones, and complications were analyzed. Follow-up was 4 months.

RESULTS

Two hundred and six patients out of 250 examinations were evaluated. Indications were biliary stones (n = 132), bile duct stenosis (n = 93), stones and stenosis combined (n = 24), and bile duct leakage (n = 1). Of the 117 cases which were suspicious of malignancy, in 99 cases the lesion could be stratified into benign (n = 55) or malignant (n = 44) indicating a sensitivity of 95.5% and a specificity of 94.5% for the indication tumor. SOC-guided biopsies revealed a sensitivity of 57.7% with a specificity of 100%. In 107 examinations, biliary stones were visualized and could be completely removed in 91.1% with a need of three procedures (range 1-6) to achieve final stone clearance. In 75 cases, lithotripsy was performed and was successful in 71 cases (95%). Four out of 45 patients (8.9%) underwent cholecystectomy with surgical bile duct revision as a final therapy. Adverse Event (AE) occurred in 33/250 patients (13.2%) and Serious Adverse Event (SAE) occurred in 1/250 patients (0.4%). Cholangitis was 1% (n = 102) after peri-interventional administration of antibiotics and 12.8% (n = 148) without antibiotic prophylaxis (p < 0.001).

CONCLUSIONS

SOC with SpyGlassDS™ became a new standard for the diagnosis of indefinite biliary lesions and therapy of large bile duct stones. The diagnostic yield of SOC-guided biopsies facilitated a definite diagnosis in most cases and should be improved by standardized biopsy protocols. SOC-guided interventions allowed removal of large biliary stones by SOC-guided lithotripsy. The complication rate of 13.2% can be considerably reduced by use of a single-shot antibiotic treatment.

Narrow-band imaging vs. high definition white light for optical diagnosis of small colorectal polyps: a randomized multicenter trial

BACKGROUND AND STUDY AIM

The aim of the study was to compare the latest narrow-band imaging (NBI) device with high-definition white light (HDWL) endoscopy for accuracy of real-time optical diagnosis of small colorectal polyps.

PATIENTS AND METHODS

We conducted a randomized, prospective, multicenter trial at three study sites in Germany. In the NBI arm, endoscopists used NBI for the prediction of polyp pathology on the basis of the NBI International Colorectal Endoscopic classification. In the HDWL arm, NBI was not used for optical classification of polyp histology. The primary outcome was accuracy of optical diagnoses (neoplastic vs. non-neoplastic) in small polyps measuring < 10 mm. Secondary end points included sensitivity and negative predictive value (NPV).

RESULTS

A total of 380 patients were randomized 1:1 to either the NBI or HDWL arm. A total of 421 polyps measuring < 10 mm were detected (55.8 % neoplastic, 44.2 % non-neoplastic). Accuracy, sensitivity, and NPV were 73.7 %, 82.4 %, and 75.5 %, respectively, in the NBI arm and 79.2 %, 79.8 %, and 73.4 %, respectively, in the HDWL arm (P = 0.225, P = 0.667, P = 0.765). More polyps were assessed with high confidence in the HDWL arm (82.6 %) than in the NBI arm (73.7 %; P = 0.038). The NPV of the prediction of neoplastic histology in diminutive polyps (≤ 5 mm) rated with high confidence was 90.3 % in the NBI arm. We detected significant differences between the participating study sites in the performance data of predictions.

CONCLUSION

The levels of accuracy for real-time prediction of polyp histology (< 10 mm) did not differ between NBI and HDWL for optical diagnosis. Variation in the performance of optical diagnosis was apparent between study centers.

TRIAL REGISTRATION

ClinicalTrials.gov (NCT02009774).

[Choledochal cysts in adult patients--presentation and clinical course]

HISTORY

A 35-year-old male was admitted with recurrent acute pancreatitis of unknown origin. He was found to have a cystic lesion in the upper abdomen believed to be a pancreatic pseudocyst (patient 1). A 59-year-old female with a choledochal cyst developed acute pancreatitis (patient 2). A 32-year-old male who had been operated upon for a choledochal cyst during childhood was admitted for upper abdominal pain, fever and vomitus (patient 3).

INVESTIGATIONS AND DIAGNOSIS

Patient 1 was found to have a choledochal cyst type IV a according to TODANI. Patient 2 was diagnosed to have a choledochal cyst type Ib according to TODANI. The cyst was believed to contain a bile duct carcinoma. In patient 3, sonography showed an advanced Klatskin tumour with infiltration of the portal vein, the hepatic artery and the liver. Bile cytology confirmed the carcinoma. In all patients cholestasis was found. Pancreatic enzymes were elevated in patients 2 and 3.

TREATMENT AND COURSE

Patient 1 underwent left hemihepatectomy and received a biliodigestive anastomosis. In patient 2 the choledochal cyst was resected while undergoing pylorus-preserving resection of the pancreatic head. The tumour suspected was confirmed and R0 resected. Patient 3 presented with an incurable bile duct carcinoma. He died 3 months later from multiple lung emboli.

CONCLUSION

Choledochal cysts are associated with a 20 fold increase in the incidence of bile duct carcinoma.