case_images: PMC8265241_01
case_images: intraoperative aspect; white arrow: Castleman tumor; yellow arrow: pancreatic head; green arrow: duodenum
case_images: PAMJ-38-339-g001.jpg
case_images: PMC8265241_01_PAMJ-38-339-g001.jpg
case_images: F1
case_images: Intraoperatively, there was a well-encapsulated soft-tissue mass measuring 3.5 x 2.5 x 1.5cm, firm in consistency and deriving blood supply from multiple sources (Figure 1).
case_images: histological examination; Castleman's disease of hyaline vascular type
case_images: PAMJ-38-339-g002.jpg
case_images: PMC8265241_01_PAMJ-38-339-g002.jpg
case_images: F2
case_images: In interfollicular sectors, multiple hyaline vascular structures were noticed, giving "lollipop" appearance (Figure 2).
case_images: immunohistochemical staining positive for CD20+
case_images: PAMJ-38-339-g003.jpg
case_images: PMC8265241_01_PAMJ-38-339-g003.jpg
case_images: F3
case_images: Immunohistochemical study revealed that tumor cells were positive for CD20+ mainly in the follicular regions (Figure 3).