Nonseminomatous Extragonadal Germ Cell Tumor Presenting As Early Pericardial Tamponade.

Multiple different types of mediastinal masses may be encountered on imaging techniques in symptomatic and asymptomatic patients. The most frequent mediastinal masses in adults are thymoma, lymphoma, thyroid masses, and germ cell tumors. Potential complications of these masses due to localized invasion include hemoptysis, post-obstructive pneumonia, and superior vena cava syndrome. Pericardial tamponade is usually secondary to pericarditis, trauma, infections, radiation, uremia, vascular diseases, and uremia. However, this report presents a case of a young patient who was found to have a large pericardial effusion and early signs of pericardial tamponade, which have not previously been reported as complications of extragonadal germ cell tumors, to the best of our knowledge.