Purpose To investigate the epidemiology, etiology, and clinical characteristics of patients with pyogenic liver abscesses (PLA) and provide guidance for clinical treatments. Patients and Methods A retrospective study was performed on a cohort of 402 hospitalized patients diagnosed with PLAs at the Affiliated Hospital of Chengde Medical College between January 2016 and December 2021. Patient demographics, drug sensitivity profiles, and microbiological culture results of drainage and blood samples were thoroughly analyzed to identify significant patterns or trends. Furthermore, clinical characteristics and treatments for patients with PLA were comprehensively assessed. Results Patients aged 50–69 years had the highest incidence of PLA, accounting for 59.9% of all cases, and 91.5% of them had a fever. Bacterial culture analysis of the 200 patients revealed that Klebsiella pneumoniae (K. pneumoniae) was the most predominant pathogen, detected in 70.5% of cases, exhibiting an upward trend. Escherichia coli (E. coli) was the second most frequently detected pathogen, identified in 14.5% of cases, showing a downward trend. Coexisting diabetes mellitus (DM) was found to be the most common comorbidity for PLA, occurring in most patients with the condition. Patients with a history of abdominal surgery and malignancy had an increased risk for PLA, while those with gallstones had a decreased risk. Drainage combined with antibiotic therapy was identified as the primary treatment of PLA. In addition, multivariate analysis demonstrated that coexisting DM and the presence of gas in the abscess cavity were independent risk factors for septic shock in patients with PLA. Conclusion This study reveals a shift in the proportions of pathogens and risk factors in patients with PLA, underscoring the necessity for improved diagnostic and therapeutic strategies.

Background: Gastrointestinal bleeding caused by a ruptured pancreatic pseudoaneurysm is rare, and a pseudoaneurysm of the posterior inferior pancreaticoduodenal artery is especially rare. A 68-year-old man was hospitalized after presenting intermittent black stools and dyspnea accompanied by severe anemia. Angiographic examination revealed that Pseudoaneurysm of the posterior inferior pancreaticoduodenal artery.Methods: Angiography was performed and revealed a pseudoaneurysm of the posterior inferior pancreaticoduodenal artery. Subsequently, a blood transfusion and endovascular embolization were performed.Results: The patient's gastrointestinal bleeding stopped, and the hemoglobin level remained stable. During 1 year of follow-up, the patient remained in a generally good condition.Conclusion: posterior inferior pancreaticoduodenal artery pseudoaneurysmIt is rare and difficult to diagnose, gastrointestinal bleeding is a serious complication, vascular interventional embolization is effective.