Abstract
Malignant lymphoma developing from chest wall is believed to be closely related to chronic tuberculosis pyothorax or EB virus infection. Furthermore, this tumor believed to have a poor prognosis compared to other lymphomas. We experienced a case of B cell malignant lymphoma on the left side chest-wall without history of tuberculosis or empyema. EBNA antibody and IgG-type VCA antibody were negative. The tumor invaded the abdominal wall and diaphragma but riot the parietal pleura. Then surgical dissection encompassing the thoraco-abdominal wall and partial diaphragma was performed. Tumor dissected completely at pathological examination. The patient is alive, and there was no evidence of recurrence in the thirty-month follow-up examination. We report a rare case without pyothorax and EB virus infection and good outcome.