Bacterial Pericarditis Caused by Penetration of a Migrated Biliary Stent from the Lateral Segment of the Liver: A Case Report

Endoscopic biliary stent insertion is a well-established procedure that is indispensable in the management of various benign and malignant biliary disorders, and one that helps prevent mortality related to invasive surgical procedures. We report a rare case of the distal migration of a biliary stent outside the abdomen to the pericardium, inducing constrictive pericarditis and septic shock. This case alerts clinicians to be aware of potential adverse events that can lead to unfavorable patient outcomes. Such adverse events can be effectively avoided through early detection and intervention.

Bactibilia-effect on postoperative course and outcome in patients with bilio-pancreatic diseases

Background: Bactibilia is detrimental to the outcomes of biliary tract surgery. The present study was undertaken to determine the microbial flora of bile and their significance to post-operative infectious complications and morbidity.Methods: A retrospective study of patients with biliopancreatic diseases who underwent surgery from Jan 2017 to March 2020 in a tertiary care hospital were analyzed. The samples were assessed for bile microbiological flora, and a search for their possible link with post-operative infectious complications and morbidity was carried out.Results: A total of 90 bile samples were assessed. The mean age of the study group was 51.8 SD-13.6 years with male predominance. Bactibilia was found in 39 cases (43.3%), mostly in patients with malignant diseases, older than 50 years and females. Escherichia coli was the most common organism. Post-operative infectious complications were seen in twenty cases, thirteen of them in bactibilia-associated patients, showing statistical significance. Statistical significance was found between the presence of pre-operative biliary stent and bactibilia and between diabetes mellitus and bactibilia. Nine out of 24 patients with comorbidities had post-operative infectious complications. No significant relationship was found between pre-operative jaundice and comorbidities with bactibilia. Conclusions: The present study showed a statistically significant relationship between the presence of pre-operative biliary stent and bactibilia and also the incidence of post-operative infectious complications and bactibilia. Microbiological analysis of bile is a valuable tool in prognosticating the post-operative complications, thereby guiding us to provide adequate therapy and helps to establish local antibiotic guidelines.

Role of biliary stent and neoadjuvant chemotherapy in the pancreatic tumor microbiome

Background Intra-tumor microbiota have been implicated in pancreatic ductal adenocarcinoma (PDAC) development, treatment response and post-treatment survivorship. Moreover, therapeutic interventions targeting microbiota may improve the response to chemotherapy and immunotherapy, further emphasizing the critical need to understand the origins of and growth of bacteria within the pancreatic tumor microenvironment. Here, we studied the role of several clinical factors on the bacterial colonization of PDAC. Results We obtained matched tumor and normal pancreatic tissue specimens from 27 patients who had undergone surgical resection for PDAC between 2011 and 2015 from the University of Minnesota Biological Materials Procurement Network (BioNet). We found that 26 (48%) out of 54 pancreatic tissue samples harbored detectable bacterial communities using real-time PCR targeting the 16S rRNA gene. Bacterial colonization was detected significantly more frequently in samples from patients who had pancreatic head tumors, underwent Whipple procedure, or had preoperative biliary stent placement. There was also a significantly greater relative abundance of microbiota from the family Enterobacteriaceae among samples from patients who underwent biliary stent placement or neoadjuvant treatment with a combination of Gemcitabine and Paclitaxel. Conclusions These findings suggest that biliary stent placement and neoadjuvant chemotherapy are associated with specific alterations that promote the infiltration and growth of intra-tumor bacteria in the setting of PDAC. Further studies exploring whether specific bacterial communities could contribute to increased chemoresistance will be essential for optimizing medical therapies in the future.