Plasma Cell Gingivitis Treated with Photobiomodulation, with No Recurrence for a Five-Year Follow-Up

Figure 2

(a) The panoramic histological picture shows an oral mucosa punch biopsy, with highly cellular stroma (hematoxylin–eosin 20×). (b) At higher magnification, the oral mucosa appears spongiotic with mononuclear cell exocytosis, associated with dense stromal inflammation (hematoxylin–eosin 100×). (c) The stroma displays an intense infiltration of normal-appearing plasma cells (hematoxylin–eosin 200×). (d) Plasma cells are polyclonal, expressing both kappa (kappa light chain immunostaining 200×). (e) Lambda light chains (lambda light chain immunostaining 200×).

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