Lymphangioma (cystic hygroma) of the mediastinum.
D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008202:Lymphangioma / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology / Q000601:surgery; D008208:Lymphatic System / Q000002:abnormalities / Q000196:embryology; D008297:Male; D008479:Mediastinal Neoplasms; D010784:Photomicrography; D011859:Radiography