Retroperitoneal congenital epidermoid cyst misdiagnosed as a solid pseudopapillary tumor of the pancreas: A case report

Figure 1 Preoperative image. A: Preoperative computed tomography image showing one giant subcircular mass in the uncinate process of the pancreas; B: Preoperative magnetic resonance image showing one cyst adjacent to the pancreas.

Figure 2 Intraoperative view of gross inspection of the cystic mass. A: Large retroperitoneal mass is closely connected to the superior mesenteric vein and to the root of the superior mesenteric artery; B: Operative specimen showing a giant retroperitoneal cystic mass of approximately 10 cm in the largest dimension.

Figure 3 Computed tomography image. A: Microscopic image of a giant epidermoid cyst with a stratified squamous epithelium containing necrotic debris (HES ×100); B: Postoperative computed tomography image showing no abnormalities in the surgical region.