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  Indian J Med Microbiol
 

Figure 4: Immunoperoxidase stain (a) Heterogeneous positivity for K immunostaining (arrow) in Hashimoto thyroiditis (x400). (b) Hashimoto thyroiditis showing positive λ immunostaining of the reactive lymphoid population (arrow), the arrowhead points to thyroid follicle with small non-destructive LEL (x400). (c) Thyroid lymphoma; all tumor cells show strong and diff use expression of K light chain (x400). (d) Thyroid lymphoma; all tumor cells show lack of λ light chain expression (x400)

Figure 4: Immunoperoxidase stain (a) Heterogeneous positivity for <sub>K</sub> immunostaining (arrow) in Hashimoto thyroiditis (x400). (b) Hashimoto thyroiditis showing positive λ immunostaining of the reactive lymphoid population (arrow), the arrowhead points to thyroid follicle with small non-destructive LEL (x400). (c) Thyroid lymphoma; all tumor cells show strong and diff use expression of <sub>K</sub> light chain (x400). (d) Thyroid lymphoma; all tumor cells show lack of λ light chain expression (x400)