Primary Pulmonary MALT Lymphoma with Ground-glass Nodule.

A 65-year-old Japanese woman was admitted because of an abnormal chest shadow. Ten years earlier, she had been diagnosed with surgical lung biopsy-confirmed primary pulmonary mucosa-associated lymphoid tissue (MALT) lymphoma. Chest computed tomography (CT) showed a partially solid nodule (Picture 1). A surgical lung biopsy showed a lymphoepithelial lesion and follicular colonization (Picture 2). She was diagnosed with recurrent MALT lymphoma. A 75-year-old Japanese man was admitted because of an abnormal chest shadow. Chest CT showed a nodule with a ground-glass halo (Picture 3). A surgical lung biopsy showed a lymphoepithelial lesion and diffuse infiltration by lymphocytes (Picture 4). He was diagnosed with MALT lymphoma. The CT findings mimicked adenocarcinoma; therefore, we performed a surgical lung biopsy. The typical CT findings in MALT lymphoma are pulmonary masses (87%), and ground-glass nodules are rare (1,2). Nevertheless, physicians should consider MALT lymphoma in patients with ground-glass nodules.

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The authors state that they have no Conflict of Interest (COI).