Question: Question linked to image nº4 70-year-old man, active smoker, who underwent a chest radiological study as a preoperative protocol for prostatic hypertrophy. What would be the fundamental semiological finding of this radiological image? 
 Options:  <1> Encapsulated left pleural effusion. <2> Tumor of the anterior soft tissues of the thorax. <3> Collapse of the left upper lobe. <4> Anterior mediastinal mass. <5> Elevation of the left diaphragmatic dome.
3