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  Indian J Med Microbiol
 

Figure 7: Photomicrographs of (a) H and E stained (×100) biopsy specimen with characteristic “Zell-Ballen” appearance of paraganglioma. (b) Immunohistochemical staining (×200) using chromogranin A: strongly positive. (c) Immunohistochemical s t a i n i n g (×2 0 0) u s i n g s y n a p t o p h y s i n : s t r o n g l y positive. (d) Immunohistochemical staining (×100) using glial fibrillary acid protein: Negative suggesting malignant nature of paraganglioma

Figure 7: Photomicrographs of (a) H and E stained (×100) biopsy specimen with characteristic “Zell-Ballen” appearance of paraganglioma. (b) Immunohistochemical staining (×200) using chromogranin A: strongly positive. (c) Immunohistochemical s t a i n i n g (×2 0 0) u s i n g s y n a p t o p h y s i n : s t r o n g l y positive. (d) Immunohistochemical staining (×100) using glial fibrillary acid protein: Negative suggesting malignant nature of paraganglioma