PMC3325747_01
A) Hematoxylin and eosin (H&E) staining showing mucosa-associated lymphoid tissue (MALT) thyroid lymphoma; B) immunohistochemical evaluation reported MALT-balls; C) D) E) F) G) serial sections immunostained for CD79+, CD20+, cIg-kappa, cIg-lambda, L26, respectively.
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PMC3325747_01_rt-2012-1-e2-g001.jpg
F1
The immunohistochemical study revealed monoclonal cytoplasmic immunoglobulin expression of cIg-lambda in the plasma cell population (Figure 1).