case_images: PMC10948454_01
case_images: Imaging findings. (A, B). Computed tomography (CT) revealed a 2 cm right adrenal mass (red arrow in (A)). The mean Hounsfield unit of the adrenal tumor on unenhanced CT was 14.0. (A). Unenhanced CT. (B). Contrast enhanced CT. (C). NP-59 scintigraphy with dexamethasone suppression showed increased tracer uptake in the right adrenal lesion.
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case_images: PMC10948454_01_fendo-15-1286297-g001.jpg
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case_images: Adrenal CT revealed a 2 cm right adrenal mass ( Figures 1A, B ). Adrenal venous sampling indicated excess aldosterone production from the right adrenal gland ( Table 2 ). 131I-6beta-iodomethyl-19-norcholesterol (NP-59) scintigraphy with dexamethasone suppression further demonstrated increased tracer uptake in the right adrenal lesion ( Figure 1C ).
case_images: Histopathology of resected adrenal tumor. (A). Cut surfaces of resected adrenal tissue showing a yellow nodule with a diameter of 2.0 cm. Scale bar, 1 cm. (B, C). High magnification photomicrographs of adrenal tumor. Scale bars, 300 microm. (B). Hematoxylin and eosin staining. (C) Ki-67 staining.
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case_images: PMC10948454_01_fendo-15-1286297-g002.jpg
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case_images: The resected tumor was histologically diagnosed as adrenocortical adenoma according to the criteria of Weiss and also harboring the foci of pseudoglandular formations ( Figures 2A, B ). Notably, Ki-67 labeling index was high (6% at hotspots) ( Figure 2C ).