PMC9226414_01
Electrocardiograph (ECG). ECG at admission shows sinus rhythm and QTc interval of 661 ms [(A) red arrow]. After excision of pheochromocytoma, ECG shows normalization with QTc of 404 ms [(B) green arrow].
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F1
Most notably, it showed a QTc interval of 661 ms (Figure 1A). After 1 month follow-up, the patient's ECG was completely normal with a QTc of 404 ms (Figure 1B).
CT of abdomen. A computed tomographic (CT) of the upper abdomen (axial view) shows a 53 mm*58 mm heterogeneous tumor of the right adrenal gland [(A) red arrow]. Axial contrast-enhanced CT image shows the mass compose of solid enhancing component and cystic component [(B) green arrow].
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F2
Axial contrast-enhanced CT demonstrated a mass consisting of solid enhancement and cystic components (Figures 2A,B).
Histologic findings. Histological evaluation of adrenal neoplasms revealed rounded to polygonal cells with abundant granular amphoteric cytoplasm arranged in well-defined nests [(A) hematoxylin, and eosin]. Immunohistochemical testing shows positive expression of CgA (B).
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F3
Histopathologic examination of the adrenal mass showed that it was a typical pheochromocytoma, with large polygonal cells arranged in a thick nest and separated by a rich capillary network (zellballen appearance) (Figure 3A). Positive expression of tyrosine ki-67, CgA, Syn, and NSE on immunohistochemical examination (Figure 3B).