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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Mayo Clin Proc. 2013 Oct 4;88(11):1340–1346. doi: 10.1016/j.mayocp.2013.06.023

Figure 2. Histopathological and Immunohistochemical Evaluation of Pheochromocytoma.

Figure 2

Histopathological evaluation of the pheochromocytoma showed connective tissue with clusters and isolated pleomorphic tumor cells with abundant and granular cytoplasm (Panel A, H&E stain). Immunohistochemical staining for choline acetyltransferase (ChAT) shows strong cytoplasmic staining of most tumor cells in this field (Panel B, anti-ChAT stain). Two of five additional archival specimens stained positively for ChAT (Panels C & D, anti-ChAT stain). ChAT = choline acetyltransferase.