[Acute acalculous cholecystitis complicating the presentation of cardiac tamponade as the initial manifestation of a pulmonary carcinoma].

The finding of a cardiac tamponade (CT) as initial manifestation of lung cancer is rare, being its most frequent manifestations dyspnea, cough and edemas. The presence of alithiasic acute cholecystitis (AAC) as early manifestation of CT is extremely rare, despite this having being described related to other situations of low cardiac output. We present the case of a patient who underwent emergency surgery due to AAC as a form of presentation of CT, this being the initial manifestation of a pulmonary adenocarcinoma. The histopathological study of the liver and the vesicle were compatible with signs of short evolution venous stasis, and the diagnosis was established through pericardium biopsy and thoracic CAT.