Mediastinal Ectopic Pancreas with Abundant Endocrine Cells Coexisting with Mediastinal Cyst and Thymic Hyperplasia

Figure 3

Immunohistochemical staining. (a and b) High expression of insulin in pancreatic beta cells of islets of Langerhans (10x–40x). (c and d) Strong positivity of chromogranin in islets of Langerhans (10x–40x). (e and f) Cytokeratin showed strong positivity in acinic cells and pancreatic duct; meanwhile endocrine cells showed very weak expression (4x–10x).

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