Tramadol Induced Adrenal Insufficiency: Histological, Immunohistochemical, Ultrastructural, and Biochemical Genetic Experimental Study

Figure 4

Photomicrographs of the adrenal gland of group IV showing (a) ZF cells appearing nearly similar to that of control (black arrow); few cells appear shrunken with hyperacidophilic cytoplasm and pyknotic nuclei (yellow arrows), ×400 (b); congested blood capillaries especially at the area of ZR (arrow), ×100; (c) numerous mitotic figures (arrows) in ZR, ×400.

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