Figure 2From: An atypical case of lymphoproliferative pulmonary involvement in a patient with Sjögren’s syndrome: a case reportA lung biopsy specimen of the left lower lobe, showing mild and homogeneous interstitial pneumonia, with the presence of numerous lymphoid follicles and no definite nuclear atypicality in the lymphocytes [hematoxylin-eosin stain; magnification ×40 (A), ×100 (insert upper), ×400 (insert lower): the boundary part between the lymphoid follicle (lower right) and surrounding tissue]. The immunohistochemical staining for L26, showing exclusively B-lymphocytes within the lymphoid follicles that exhibited a brownish reaction product [magnification ×40 (B), ×100 (insert)]. The immunohistochemical staining for bcl-2, showing the distribution of bcl-2 positive lymphocytes around the centers of lymphoid follicles (reactive hyperplasia pattern) [magnification ×40 (C), ×100 (insert)]. The immunohistochemical staining for UCHL-1, showing diffusely distributed T-lymphocytes in the alveolar walls or around the lymphoid follicles [magnification ×40 (D), ×100 (insert)].Back to article page