Fig. 2From: Successful treatment of a primary gastric plasmacytoma mimicking intractable gastric ulcer by using high-dose dexamethasone therapy: a case report a, b On microscopic examination, a large amount of lymphoplasmacytic proliferation and infitration (arrow) was observed (a, ×200; b, ×400). c, d On immunohistologic examination, tumor cells were negative for kappa stain (c, ×400) but positive for lambda stain (d, ×400)Back to article page