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Fig. 2 | Surgical Case Reports

Fig. 2

From: Primary pulmonary mucosa-associated lymphoid tissue lymphoma with amyloid light chain-type amyloidosis

Fig. 2

a Eosinophilic deposition with lymphoplasmacytic infiltration was noted. b The eosinophilic deposition stained positive with Congo red. c Immunostaining for AE1/AE3 and CD20 revealed extensive infiltration of B cells to the bronchial epithelial cells (lymphoepithelial lesion). d, e B cells with monoclonal proliferation predominantly had a κ chain by in situ hybridization (κ chain: λ chain ratio, 20:1)

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