[Cervical mass as an isolated finding in primary mediastinal seminoma]

Seminoma is a malignant tumor of germ cell origin, usually found in male gonads. Primary seminoma of the mediastinum is rare. The natural history of mediastinal seminoma is growth which is asymptomatic until a late stage, and therefore when diagnosed it is large and causes symptoms of cough, hoarseness and chest pain. A cervical mass is a rare finding in this tumor, and when it is found it is considered a metastasis to a cervical lymph node. This is a case history of a patient referred for evaluation of a mass in the lower neck, which proved to be a direct extension of the primary anterior mediastinal tumor. The tumor was diagnosed pathologically as a primary mediastinal seminoma. Despite the findings of a massive tumor in the mediastinum, the patient had no complaints.