title: Case report of a difficult clinical diagnosis.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006491:Hemothorax / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000150:complications; D009203:Myocardial Infarction / Q000175:diagnosis*