RESUMO
Introduction: and importance: Although dengue fever classically presents with fever, headache, retro-orbital pain, myalgia, arthralgia, and vomiting, it can have unusual manifestations like acalculous cholecystitis. The study highlights the importance of atypical presentations of dengue fever in suspecting dengue earlier, especially during outbreaks. Case presentation: Herein, we report a case of a 29 years old female who presented with fever for 5 days which was associated with headache, body ache, vomiting, and abdominal pain in the right hypochondriac region. Lab results came positive for dengue NS1 antigen, and ultrasonography showed features suggestive of acalculous cholecystitis. She was managed conservatively after which her symptoms resolved gradually. Clinical discussion: Acute acalculous cholecystitis in dengue could be due to increased vascular permeability leading to edematous thickening of the gall bladder wall. It should be suspected if a patient presents with fever, right upper quadrant pain, abnormal liver function tests, and thickened gall bladder wall without stones on abdominal ultrasonography. Conclusion: Acute acalculous cholecystitis is an atypical presentation of dengue fever. Awareness of atypical presentations of dengue helps in identifying dengue earlier and preventing complications.