Fig. 3
From: Surgical resection of a middle mediastinal paraganglioma that caused diabetes
Microscopic appearance. a Hematoxylin–eosin staining showed that the tumor cells, with clear cytoplasm, were arranged in nests (×100). b–d The tumor was immunoreactive for synaptophysin, chromogranin A, and CD56 protein, and was diagnosed as a paraganglioma arising in the middle mediastinum (×100)