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Fig. 2 | Journal of Medical Case Reports

Fig. 2

From: Micronodular thymoma with lymphoid stroma diagnosed 10 years after the first operation: a case report

Fig. 2

Histological finding of thymic tumor resected at the present operation. a Low-magnification image shows small epithelial tumor nodules are separated by abundant lymphoid stroma (hematoxylin and eosin stain). b High-magnification image shows the nodules consist of spindle and oval epithelial tumor cells. c Epithelial tumor nodules are well stained by cytokeratin staining (AE1/3). d, e Most lymphocytes had positive immunostaining for CD3 (= T cell) or CD20 (= B cell), and scattered lymphoid follicles were positive for CD20. f Linear connective tissue (arrow) is found in the center of the tumor (hematoxylin and eosin stain). g The connective tissue is stained blue-green by elastica-Masson staining. The tissue is identified as collagenous tissue, and assessed as scar tissue from the previous operation. EM elastica-Masson, HE hematoxylin and eosin stain

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