Acute acalculous cholecystitis due to Fusarium species and review of the literature on fungal cholecystitis

Acalculous Cholecystitis in COVID-19 Patients: A Narrative Review

Acute acalculous cholecystitis (AAC) represents cholecystitis without gallstones, occurring in approximately 5-10% of all cases of acute cholecystitis in adults. Several risk factors have been recognized, while infectious diseases can be a cause of cholecystitis in otherwise healthy people. Coronavirus disease 2019 (COVID-19) is caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and has spread worldwide, leading to an unprecedented pandemic. The virus enters cells through the binding of the spike protein to angiotensin-converting enzyme 2 (ACE2) receptors expressed in many human tissues, including the epithelial cells of the gastrointestinal (GI) tract, and this explains the symptoms emanating from the digestive system. Acute cholecystitis has been reported in patients with COVID-19. The purpose of this review is to provide a detailed analysis of the current literature on the pathogenesis, diagnosis, management, and outcomes of AAC in patients with COVID-19.

HAV-induced acalculous cholecystitis: A case report and literature review

Hepatitis A virus (HAV) has some life-threatening extrahepatic complications, such as acute acalculous cholecystitis (AAC). We present HAV-induced AAC in a young female, based on clinical, laboratory, and imaging findings, and conduct a literature review. The patient became irritable, which progressed to lethargy, as well as a significant decline in liver function, indicating acute liver failure (ALF). She was immediately managed in the intensive care unit with close airway and hemodynamic monitoring after being diagnosed with ALF (ICU). The patient's condition was improving, despite only close monitoring and supportive treatment with ursodeoxycholic acid (UDCA) and N-acetyl cysteine (NAC).

Correlation of Inpatients Suffering from Acute Acalculous Cholecystitis during ICU Treatment with Acute Physiology and Chronic Health Evaluation II Score, Duration of Ventilator Use, and Time on Total Parenteral Nutrition

Objective

To explore the correlation of inpatients suffering from acute acalculous cholecystitis (AAC) during ICU treatment with Acute Physiology and Chronic Health Evaluation II (APACHE-II) score, duration of ventilator use, and time on total parenteral nutrition (TPN).

Methods

From March 2016 to March 2022, the clinical data of 47 patients with AAC who received ICU treatment in our hospital were retrospectively reviewed, and these patients were included in the AAC group. Another 36 patients treated in the ICU in the same period with age and gender matching with those in the AAC group were selected as the non-AAC group. Patients' various clinical data were recorded to analyze the correlation of AAC with APACHE-II score, duration of ventilator use, and time on TPN.

Results

The shock time, duration of ventilator usage, and duration of sedative medicine use were all substantially longer in the AAC group than in the non-AAC group, according to the univariate analysis (P < 0.05); the amount of norepinephrine used, white blood cell count, C-reactive protein (CRP) amount, and APACHE-II score were significantly higher in the AAC group than in the non-AAC group (P < 0.05); between the two groups, the time on TPN and fasting time were different, but with no statistical significance (P > 0.05); after performing Spearman's correlation with the significantly between-group different indicators, the result showed that the amount of norepinephrine used, duration of ventilator use, white blood cell count, and CRP amount were significantly correlated with the occurrence of AAC, and the correlation was positive (P all <0.001).

Conclusion

The APACHE-II score and time on TPN are not significantly correlated with the occurrence of AAC; and the amount of norepinephrine used, duration of ventilator use, white blood cell count, and serum CRP are positively correlated with the occurrence of AAC. Measuring the variations in the levels of various markers can signal the onset of AAC or reflect the state and prognosis, suggesting a possible application in clinic-based targeted prevention and treatment of AAC.

Environmental and Lifestyle Risk Factors in the Carcinogenesis of Gallbladder Cancer

Gallbladder cancer (GBC) is an aggressive neoplasm that in an early stage is generally asymptomatic and, in most cases, is diagnosed in advanced stages with a very low life expectancy because there is no curative treatment. Therefore, understanding the early carcinogenic mechanisms of this pathology is crucial to proposing preventive strategies for this cancer. The main risk factor is the presence of gallstones, which are associated with some environmental factors such as a sedentary lifestyle and a high-fat diet. Other risk factors such as autoimmune disorders and bacterial, parasitic and fungal infections have also been described. All these factors can generate a long-term inflammatory state characterized by the persistent activation of the immune system, the frequent release of pro-inflammatory cytokines, and the constant production of reactive oxygen species that result in a chronic damage/repair cycle, subsequently inducing the loss of the normal architecture of the gallbladder mucosa that leads to the development of GBC. This review addresses how the different risk factors could promote a chronic inflammatory state essential to the development of gallbladder carcinogenesis, which will make it possible to define some strategies such as anti-inflammatory drugs or public health proposals in the prevention of GBC.

Advances in the Study of Acute Acalculous Cholecystitis: A Comprehensive Review

BACKGROUND

Acute acalculous cholecystitis (AAC) is characterized by acute necrotizing inflammation with no calculi and is diagnosed based on imaging, intraoperative, and pathological examinations.

KEY MESSAGE

Although AAC has been studied clinically for a long time, it remains difficult to diagnose and treat. The pathogenesis of AAC is still not fully understood, and it is often regarded as a relatively independent clinical disease that is different from acute calculous cholecystitis (ACC). Pathological studies suggest that AAC is the manifestation of a critical systemic disease, while ACC is a local disease of the gallbladder.

SUMMARY

Concerning the pathogenesis, diagnosis, and treatment of AAC, we reviewed the research progress of AAC, which will enhance the understanding of the early diagnosis and treatment of AAC.

Acute acalculous cholecystitis due to infectious causes

Acute acalculous cholecystitis (AAC) is an inflammation of the gallbladder not associated with the presence of gallstones. It usually occurs in critically ill patients but it has also been implicated as a cause of cholecystitis in previously healthy individuals. In this subgroup of patients, infectious causes comprise the primary etiology. We, herein, discuss the pathophysiological mechanisms involved in AAC, focusing on the infectious causes. AAC associated with critical medical conditions is caused by bile stasis and gallbladder ischemia. Several mechanisms are reported to be involved in AAC in patients without underlying critical illness including direct invasion of the gallbladder epithelial cells, gallbladder vasculitis, obstruction of the biliary tree, and sequestration. We emphasize that multiple pathogenic mechanisms may concurrently contribute to the development of AAC in varying degrees. Awareness of the implicated pathogens is essential since it will allow a more focused examination of the histopathological specimens. In conclusion, additional research and a high degree of clinical suspicion are needed to clarify the complex spectrum of mechanisms that are involved in the pathogenesis of AAC.