Abstract
A 49-year-old man was admitted to our hospital because of suspicious lung shadows detected during a regular check-up. He had no respiratory symptoms and considered himself well. The roentgenogram and computed tomograph of the chest showed multiple tumor shadows in both lung fields. Physical findings were within the normal range. Laboratory data revealed elevations of WBC count, CRP and CEA.
Metastatic lung tumor was considered as a possibility, but definitive diagnosis could not be confirmed preoperatively. Resection of the tumors in the left lung field was performed.
Microscopic findings of the resected tumors showed proliferation of fibrous tissue with infiltration by inflammatory cells (lymphocytes, plasma cells and hemosiderin-laden macrophages) and abscess formation. Thus, the final diagnosis was inflammatory pseudotumor of the lung.
Three months after surgery, chest roentgenogram disclosed no tumor shadows in the right lung field.
We believe that this disease may be caused by infection of the respiratry tract and that its natural course may be brief.
