A Case of Disappearing Ascites: Late Presentation of Acute Portal Vein Thrombosis After a Motor Vehicle Accident.

Portal vein thrombosis (PVT) has been usually diagnosed as a complication secondary to cardiac, hepatic, and malignant etiologies, but it has rarely been described in the setting of blunt abdominal trauma. This case depicts an older male who presented to the emergency department with progressive ascites and lower extremity edema within two weeks after a motor vehicle accident (MVA). Ascitic fluid analysis indicated the presence of portal hypertension, which prompted extensive evaluation to determine the etiology. Further workup, including hypercoagulable and malignancy screening, unveiled the diagnosis of acute PVT secondary to abdominal blunt force trauma, showing a rather rare presentation.