case_images: PMC11785450_01
case_images: Case 1: Representative pictures of H&E staining and immunohistochemical staining of the lung tissue biopsy sections. (A) H&E staining, 40x; (B) H&E staining, 400x; (C-H) immunohistochemical staining of CD20, CD10, BCL6, MUM1, LCA, and KI-67 sequentially, 400x.. H&E: hematoxylin and eosin.
case_images: cureus-0017-00000076758-i01.jpg
case_images: PMC11785450_01_cureus-0017-00000076758-i01.jpg
case_images: FIG1
case_images: Hematoxylin and eosin (H&E)-stained sections of lung nodule biopsy (Figure 1) showed lymphoid tissue with proliferation of medium- to large-sized atypical cells in a diffuse pattern.
case_images: PMC11785450_02
case_images: Case 2: Representative pictures of H&E staining and immunohistochemical staining of the tonsillar tissue biopsy sections. (A) H&E staining, 40x; (B) H&E staining, 400x; (C-H) immunohistochemical staining of CD20, CD10, BCL6, MUM1, c-MYC, and KI-67 sequentially, 400x.. H&E: hematoxylin and eosin.
case_images: cureus-0017-00000076758-i02.jpg
case_images: PMC11785450_02_cureus-0017-00000076758-i02.jpg
case_images: FIG2
case_images: H&E-stained sections of the right palatine tonsil (Figure 2) showed effacement of the normal architecture, replaced by sheets of large lymphoid cells with eosinophilic bubbly cytoplasm and large, irregular nuclei with multiple small nucleoli.