case_images: PMC8138230_01
case_images: CT of the abdomen shows an early enhancing mass, 5.2 cm in diameter, adjacent to the duodenum. a Arterial phase. b Portal phase. c Late phase. MRI shows a mass in the abdomen with iso-intensity on T1-weighted imaging (d), slightly high intensity on T2-weighted imaging (e), and high intensity on diffusion-weighted imaging (f).
case_images: crg-0015-0424-g01.jpg
case_images: PMC8138230_01_crg-0015-0424-g01.jpg
case_images: F1
case_images: CT revealed an equally enhancing mass, 5.2 cm in diameter, adjacent to the duodenum (Fig. 1a). On magnetic resonance imaging (MRI), the mass revealed a slightly iso-intensity signal equal to smooth muscle on T1-weighted imaging (Fig. 1d), a slightly high-intensity signal on T2-weighted imaging (Fig. 1e), and a high-intensity signal on diffusion-weighted imaging (Fig. 1f).
case_images: a Endoscopic ultrasonography shows a well-demarcated hypoechoic mass adjacent to the duodenum. The Doppler echo pattern indicates abundant blood flow. b PET-CT shows increased fluorodeoxyglucose uptake in the mass.
case_images: crg-0015-0424-g02.jpg
case_images: PMC8138230_01_crg-0015-0424-g02.jpg
case_images: F2
case_images: The Doppler echo pattern indicated abundant blood flow (Fig. 2a). Positron emission tomography-CT (PET-CT) showed the presence of an increased fluorodeoxyglucose uptake in the mass (Fig. 2b).
case_images: a Operative image. The arrow indicates the tumor. b A macroscopic image shows a flesh-colored and homogenous tumor. c A histological examination shows that the lymph follicles are markedly increased in number throughout the cortex and medulla with vascular proliferation and hyalinization in the intra- or extra-follicles. d The germinal centers are atrophic and surrounded by a marginal zone of concentric lymphocytes.
case_images: crg-0015-0424-g03.jpg
case_images: PMC8138230_01_crg-0015-0424-g03.jpg
case_images: F3
case_images: He was diagnosed with a duodenal GIST and then underwent surgery (Fig. 3a). Macroscopically, the cut surface was flesh-colored and homogenous (Fig. 3b). Histologically, the lymph follicles were markedly increased in number throughout the cortex and medulla with vascular proliferation and hyalinization in the intra- or extra-follicles (Fig. 3c). The germinal centers were atrophic and surrounded by concentrically arranged layers of small lymphocytes (Fig. 3d).