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Key Clinical Message: Leptospirosis is an important zoonosis worldwide. Due to nonspecific clinical manifestation and poor recognition in non‐epidemic area, there is often a delay in diagnosis and treatment. Early diagnosis from Metagenomic next‐generation sequencing test is crucial for timely intervention. We presented a case of a 19‐year‐old male patient who developed leptospirosis infection characterized by acalculous cholecystitis and septic shock after typhoon events. Metagenomic next‐generation sequencing (mNGS) helped to early diagnose leptospirosis infection. Finally, the patient achieved full recovery following the antibiotic treatment in addition to supportive care and was discharged. [ABSTRACT FROM AUTHOR]

Key Clinical Message In patients with symptoms of viral infection and marked thickening of the gallbladder wall, it is important to suspect acalculous cholecystitis due to Epstein–Barr virus‐induced infectious mononucleosis. Abstract A 35‐year‐old Japanese man presented with fever, abdominal right upper quadrant pain, and liver dysfunction. Positive immunoglobulin M and ‐G antibodies and negative nuclear antigen for Epstein–Barr virus were observed. Abdominal ultrasonography revealed a markedly thickened gallbladder wall. Acalculous cholecystitis due to Epstein–Barr virus‐induced infectious mononucleosis was diagnosed.

Key Clinical Message: In patients with symptoms of viral infection and marked thickening of the gallbladder wall, it is important to suspect acalculous cholecystitis due to Epstein–Barr virus‐induced infectious mononucleosis. A 35‐year‐old Japanese man presented with fever, abdominal right upper quadrant pain, and liver dysfunction. Positive immunoglobulin M and ‐G antibodies and negative nuclear antigen for Epstein–Barr virus were observed. Abdominal ultrasonography revealed a markedly thickened gallbladder wall. Acalculous cholecystitis due to Epstein–Barr virus‐induced infectious mononucleosis was diagnosed. [ABSTRACT FROM AUTHOR]

Key Clinical Message When seeing patients who present with atypical lymphocytes and abdominal pain without accompanying symptoms of pharyngitis or lymphadenopathy, acalculous cholecystitis caused by CMV infection should be considered as a differential diagnosis. Abstract A teenage man presented with a fever and epigastric pain. The patient tested positive for cytomegalovirus IgG and IgM. Abdominal ultrasonography and contrast‐enhanced CT revealed hepatosplenomegaly and gallbladder wall thickening. MRI did not identify gallstones or tumorous lesions. He was diagnosed with infectious mononucleosis and acalculous cholecystitis caused by cytomegalovirus.

Key Clinical Message: When seeing patients who present with atypical lymphocytes and abdominal pain without accompanying symptoms of pharyngitis or lymphadenopathy, acalculous cholecystitis caused by CMV infection should be considered as a differential diagnosis. A teenage man presented with a fever and epigastric pain. The patient tested positive for cytomegalovirus IgG and IgM. Abdominal ultrasonography and contrast‐enhanced CT revealed hepatosplenomegaly and gallbladder wall thickening. MRI did not identify gallstones or tumorous lesions. He was diagnosed with infectious mononucleosis and acalculous cholecystitis caused by cytomegalovirus. [ABSTRACT FROM AUTHOR]

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). [ABSTRACT FROM AUTHOR]

Abstract 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).

We described a rare case of vaccine‐induced acalculous cholecystitis (ACC). A 52‐year‐old female developed ACC after 8 h of receiving a 3rd dose of the Pfizer‐BioNTech COVID‐19 vaccination. The symptoms subsided completely with conservative treatment for 12 days, and the ultrasound and laboratory findings went back to normal. [ABSTRACT FROM AUTHOR]

Abstract We described a rare case of vaccine‐induced acalculous cholecystitis (ACC). A 52‐year‐old female developed ACC after 8 h of receiving a 3rd dose of the Pfizer‐BioNTech COVID‐19 vaccination. The symptoms subsided completely with conservative treatment for 12 days, and the ultrasound and laboratory findings went back to normal.

Key Clinical Message Leptospirosis is the commonest zoonotic infection worldwide but is vastly underreported and extremely heterogeneous in its presentation. Acalculous cholecystitis is an under recognized presentation of acute leptospirosis. In the appropriate clinical context, with a clear exposure history, recognition of this association presents a unifying diagnosis and limits unnecessary surgical interventions. [ABSTRACT FROM AUTHOR]