PMC9891801_01
(A) Coronal T2-weighted image (T2WI). (B) Coronal contrast-enhanced fat-suppressed T1-weighted MR image (FS-T1WI). The white, red, and green arrows refer to the ectopic pancreas, stomach, adrenal gland, respectively. (C) Ectopic pancreas (hematoxylin-eosin stain; original magnification x100). (D) Adrenal cortical adenoma (hematoxylin-eosin stain; original magnification x100).
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F1
Enhanced MRI (Figure 1B) of the upper abdomen revealed a mass (3.5 x 3.0 cm) between the stomach and the left adrenal gland. The mass was isointense in the T1-weighted image (T1WI) (Figure 2B) and isointense in the T2-weighted image (T2WI) (Figure 1A). The pathology of the retroperitoneal mass was pancreatic tissue (Figure 1C). The pathology of this mass in the inferior part of the left adrenal gland was an adrenal cortical adenoma (Figure 1D).
Retroperitoneal ectopic pancreas (A-E), adrenal adenoma (F-J), and accessory spleen (K-O) in FS-T2WI (fat suppressed T2WI), in-phase T1WI, out-of-phase T1WI, diffusion-weighted imaging (DWI), and apparent diffusion coefficient (ADC).
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F2
The mass was isointense in the T1-weighted image (T1WI) (Figure 2B) and isointense in the T2-weighted image (T2WI) (Figure 1A). In the out-of-phase T1WI (Figure 2C), small patches of decreased signals were observed. ADC (Figures 2D, E) showed limited diffusion, the ADC value was 1001.4, and enhanced scanning showed uneven delayed enhancement. A round mass (1.6 x 1.2 cm) with slight hypointensity on T1WI and isointensity on fat-suppressed T2WI (FS-T2WI) was found in the inferior part of the left adrenal gland (Figures 2F-J). The signal in the out-of-phase T1WI was obviously lower than that in the in-phase T1WI. A signal of 1.7 x 1.5 cm in cross-section was observed in the splenic hilum, which was consistent with that of the spleen (Figures 2K-O).