Mediastinal Embryonal Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** An extragonadal malignant germ cell tumor that arises from the mediastinum and is composed of primitive large cells with clear or granular cytoplasm forming solid, glandular, or papillary patterns. It usually affects young males. It manifests with respiratory distress, thoracic or shoulder pain, fever, cough, superior vena cava syndrome, or hoarseness.

**Synonyms:** - Embryonal Carcinoma of Mediastinum - Embryonal Carcinoma of the Mediastinum