Retrocrural space obliteration as CT diagnostic sign of massive chylothorax in thoracic injuries.

Purpose: Blunt traumatic chylothorax could be distinguished in CT (Computer Tomography) scan as low attenuated fluid, due to chylomicrons inside, however blood intermixture in chylous effusion could make densitomery higher and hide chylothorax, due to the possible presence of an underlying hemothorax. The objective of the study is to demonstrate the specificity of retrocrural space obliteration, as additional CT sign to quickly identify and treat chylothorax. Materials and Methods: This retrospective study was undertaken since May 2012 until May 2013 and included patients scheduled for MDCT (Multi Detector CT) scan before a thoracentesis procedure diagnostic for hemothorax and chylothorax. Were used as a controls, MDCT scans performed for thoracic or thoracic-abdominal trauma, or after a