[A case of primary choriocarcinoma of the mediastinum with intrapulmonary metastasis and secondary tuberculosis in an elderly male].

Primary choriocarcinoma is a rare malignant tumor of germ cell origin. This article reports the diagnosis and treatment process of an elderly male patient with pathologically confirmed primary choriocarcinoma of the mediastinum accompanied by intrapulmonary metastasis and secondary tuberculosis. The clinical and imaging features are summarized to enhance the understanding of this disease among clinicians and radiologists and reduce the rate of missed and misdiagnosis.