[Spontaneous mediastinal hemorrhage: a study of 2 cases]

The clinical symptoms of two cases of spontaneous mediastinal hemorrhage, a rare entity of unknown etiology, are presented. In both cases the evolution was acute with initial symptomatology similar to that observed in the upper caval vein syndrome. The appearance of a large hematoma in the cervical-thoracic region constituted the outstanding clinical symptom. Imaging techniques provided the second key to diagnosis, which was made following the exclusion of the other causes of bleeding in the mediastinum. Given the apparent stability of the lesion and the absence of hemodynamic changes, treatment should only be symptomatic.