Fig. 1
From: Immunoglobulin G4-related periodontitis: case report and review of the literature
A Intraoral examination revealed generalized gingival swelling, calculus and poor oral hygiene, gingival margin was inflamed, gingivae were edematous and tenderness; B Panoramic radiograph showed alveolar bone resorption; C a, b: Histologic examination using hematoxylin-erosin (H&E) staining showed ulceration, a large number of lymphoplasmacytic cells infiltration and a storiform pattern of fibrosis, with occasional mitotic figures. (Magnification: a, ×40; b, ×100), arrowheads indicate a storiform pattern of fibrosis. c, d: Immunohistochemical staining was positive index for IgG4 (10/HPF) (magnification c ×200; d ×400), arrowheads indicate IgG4 + cells and a storiform pattern of fibrosis