Abstract
We report the case of a primary pulmonary mucosa-associated lymphoid tissue (MALT) tumor with trisomy 18. An 80-year-old man was referred to our hospital for an abnormal chest shadow detected during a routine health check-up in 2012. Chest computed tomography revealed a 4.0×2.8×2.5-cm tumor shadow in the right lower lobe (S7+8). Transbronchial biopsy performed for the tumor did not show any malignancy. However, as the tumor grew slowly, partial resection was performed via video-assisted thoracic surgery. Based on the results of immunohistochemical staining and gene analysis, the tumor was diagnosed as a primary pulmonary MALT tumor with trisomy 18.
