<prompt> A 45 yr old male comes to AIIMS emergency dept at 1am after binge drinking in night presents with severe chest pain following a episode of vomiting,the chest radiograph of this patient demonstrates which of following sign?Silhouette SignNaclerio V signSpinnaker SignHilum Overlay Sign  <response>: The given image shows lucency along the medial pa of left hemi-diaphragm and lateral aspect of aoa - known as Naclerio V sign. Seen in Boerhaave syndrome Naclerio V sign X- ray CT Hilum Overlay Sign - If the pulmonary vessels are visible through the lesionmass not obscured by the mass then it means that the masslesion is in either Anterior or posterior mediastinum but not in the hilum Hilum Overlay Sign Spinnaker Sign Thymus Sail Sign Angel wing sign - Seen in Pneumomediastinum Spinnaker Sign 