Fig. 4From: Mucosa-associated lymphoid tissue (MALT) lymphoma developing in ectopic mediastinal thyroid tissue: a case reportHistopathological findings of ectopic mediastinal thyroid tissue. A horizontal bar indicates the actual length. a Abundant thyroid follicles and lymphocytes with hematoxylin-eosin staining. b Positive lymphocytes on CD79a staining. c Lymphoepithelial lesion to epithelial cells stained positive for thyroglobulinBack to article page