DISCUSSION: Pulmonary lymphoma is classified as the primary pulmonary lymphamo (PPL) and secondary pulmonary lymphamo (SPL) on the basis of lnvolvement form, and diagnosis of lymphoma is relied on the morphologic, immunologic, pathological, and genetic features. Mediastinal node enlargement in patient with SPL is the most characteristic manifestation on chest imaging (2,3). Combining with chest scan, pathological findings and immunohistochemical feature, pulmonary HL was considered in this case. However, SPL was not almost possible to distinguish from PPL according to pathological result due to the same morphology. Taking medical history entirely, he was diagnosed with Hodgkin lymphoma (HL) because of painless enlargement of supraclavicular lymph nodes a year ago. He was performed by eight courses of chemotherapy and autologous stem cell transplantation (ASCT) during this period. In our case, the tumor cells were positive for CD15, CD30, PAX5, and occasionally CD20. So this case was compatible with sencondary pulmonary HL.