fig4

Figure 4. (a) Large neoplastic ganglionic cell with prominent nucleoli and cytoplasmic vacuolation HE; (b) strong chromogranin immunoreactivity in epitheliod tumor cells; (c) cytoplasmic synaptophysin immunoreactivity in a large ganglionic cell and the processes of the adjacent tumor cells; (d) glial fibrillary acidic protein immunoreaction accentuated at the periphery of the tumor nest characteristically seen in sustentacular paraganglioma cells