Pneumomediastinum is when air is present in the mediastinum. This is the space between the lungs and surrounding the heart. Air may enter from a leakage in a lung, the esophagus, or airways.

The heart is a hollow, muscular organ about the size of a closed fist. Located between the lungs in the mediastinum, it’s about 12.5 cm (5”) long and 9 cm (3½”) in diameter at its widest point. It ...

Sarcomas of the posterior mediastinum are rare and correspond mostly to neurogenic tumors. We studied 18 cases of liposarcoma presenting in the posterior mediastinum; because of their unusual ...

Rhabdomyoma is a rare tumor in the posterior mediastinum. We present a case of adult rhabdomyoma that occurred multifocally in the head, neck and mediastinum. There have been as few as four previous ...