PMC7250378_01
Computed tomography images of the patient. a Nonenhanced computed tomography image. b Arterial phase. c Venous phase. d Delayed phase.
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F1
The CT scan showed that the tumor was about 6 x 5 cm in size, near the adrenal gland, with uniform density and no ischemic necrosis (Fig. 1a). The enhanced CT values for the arterial phase, venous phase, and delayed phase were 164, 97, and 82 HU (Fig. 1b-d).
Positron emission tomography-computed tomography images. a, b Standardized uptake value (SUVmax). c, dDelayed imaging SUVmax.
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F2
Positron emission tomography-CT (PET-CT) revealed that the tumor had a maximum standardized uptake value (SUVmax) of 11.8 (Fig. 2a, b), and a delayed imaging SUVmax of 13.6 (Fig. 2c, d), which suggested malignant disease or CD.
Computed tomography (CT) angiography images. a, c Maximum intensity projection with spiral CT. b, dVolume rendering with spiral CT.
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F3
The results of CTA showed that the blood supply to the retroperitoneal mass was abundant, mainly from the left gastric artery, combined with an arteriovenous fistula (Fig. 3).
HE (a) and immunohistochemistry (b) for CD79a.
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F4
HE (hematoxylin and eosin) staining showed nodular hyperplasia and atrophy of the germinal center, whereas the proliferation of the peripheral lymphocytes was arranged in an "onion skin" pattern (Fig. 4a). Bcl-6-, Bcl-2+, IgD+, and cyclin D1- (Fig. 4b). Based on the lack of any other lymph node enlargement and the above examination and histopathological results, CD was diagnosed, subclassified as the hyaline vascular type (HV).