FIGURE 5.

Pulmonary mucosa‐associated lymphoid tissue (MALT) lymphoma in a 58‐year‐old female with underlying breast cancer. (a) Axial chest computed tomography (CT) image shows a 6‐mm sized well‐defined solid subpleural nodule in the right middle lobe. The lesion was misdiagnosed as a metastatic nodule before resection. (b) Microscopic examination of the resected surgical specimen at a low power field shows that the lesion consists mostly of a central solid area with no surrounding lesions consisting of sparse nodules. (c) A more magnified view shows that the lesion consists of a monotonous low‐grade B cells with marked plasmacytic differentiation.