case_images: PMC11749671_01
case_images: US image description. (A) Cystic mass between lower edge of left liver and upper edge of pancreas body, about 86 x 69 mm in size, clear boundary, close relationship with pancreas, poor boundary, and poor internal acoustic transmission. (B) Tumor CDFI: blood flow signals were seen in the wall of the sac. CDFI = color doppler flow imaging, US = ultrasonography.
case_images: medi-104-e41284-g001.jpg
case_images: PMC11749671_01_medi-104-e41284-g001.jpg
case_images: F1
case_images: Ultrasonography of the liver, gallbladder, pancreas, and spleen showed: cystic mass in the abdominal cavity (probably originated from pancreas) (Fig. 1).
case_images: CT image description. (A) In the hepatogastric space area (above pancreas), circular mixed density shadow was seen, with a large range of about 80 x 83 mm, clear boundary, slightly irregular shape, uneven internal density, and compartmentalized and stratified changes. The CT value of the upper part of the lesion was about 20 HU and the CT value of the lower part was about 35 HU on plain scan. (B) Enhanced CT scan showed that the lesion was compartmentalized and enhanced, and the boundary between some enhanced components and pancreatic parenchyma was not clear. CT = computed tomography, HU = hounsfield unit.
case_images: medi-104-e41284-g002.jpg
case_images: PMC11749671_01_medi-104-e41284-g002.jpg
case_images: F2
case_images: Tumor was considered first, but pancreatic cystadenoma was not excluded (Fig. 2).
case_images: Pathological and immunohistochemical result description. (A) Cystic mature teratoma lymphoid hyperplasia. (B) Immunohistochemical result of cystic mature teratoma B (100x): ki-67+. (C) Immunohistochemical result of cystic mature teratoma C (100x): Desmin+. (D) Immunohistochemical result of cystic mature teratoma D (100x): CK56+.
case_images: medi-104-e41284-g003.jpg
case_images: PMC11749671_01_medi-104-e41284-g003.jpg
case_images: F3
case_images: Immunohistochemistry: vimentin: (+); desmin: smooth muscle (+); CKAE1/AE3, CK56: epithelium (+); CK8/18, CK7, P40: partial (+); 0CT-2: scattered (+); localized expression: CD20, CD3, CD79a, CD5, bc1-2, bc1-6, CD10: (+); Mum1, CD68: diffuse (+); c-myc, CD30: focal (+); TTF-1Myogenin, MyoD1, S-100, Olig-2, GFAP, SALL-4, ALK: (-); Ki-67: (+) S accounted for 15% (Fig. 3).