Abstract
A 57-year-old woman was admitted to our hospital for further examinations of an abnormal shadow of the left lung field on chest X-ray films. Chest CT revealed a mass shadow, measuring 1cm in diameter, in S8 and an infiltrative shadow in S5. Lung biopsy was performed for the mass of S8 and the infiltrative shadow of S5 by video-assisted thoracoscopic surgery (VATS). Pathologically, the specimens of S5 and S8 revealed pulmonary MALT lymphoma and an intrapulmonary lymph node, respectively. Pulmonary mucosa-associated lymphoid tissue (MALT) lymphoma, which shows various features on radiologic findings, is difficult to definitively diagnose. It is considered that the occurrence and growth of both pulmonary MALT lymphoma and intrapulmonary lymph node are associated with chronic inhaled antigen stimulation, and it is presumed that this association existed in our case. It was thought that careful management is necessary for cases indicating mass lesions on biopsy by VATS that are probably of intrapulmonary lymph nodes with an infiltrative shadow.
