[A case of grade I lymphomatoid granulomatosis detected as a solitary lung nodule in a health examination].

A 31-year-old man was referred to our hospital for further investigation of a pulmonary shadow in July, 2004. Chest X-ray and CT films revealed an ill-defined nodule in the right middle lung field. Because the specimens of transbronchial lung biopsy were not diagnostic, video-assisted thoracoscopic surgery was performed. The pathologic diagnosis of the resected lung was lymphomatoid granulomatosis/angiocentric immunoproliferative lesion (LYG/AIL), grade I. Adjuvant therapy was not performed. There has been no evidence of recurrence during the 2-year postoperative follow-up period.