Desmoid type fibromatosis: A case report with an unusual etiology

Figure 1 Computerized of the abdomen: Mass in head of pancreas, a dilated common bile duct with a metallic stent in place and a dilated pancreatic duct.

Figure 2 Endoscopic ultrasound showing a 2. 5 cm × 2.2 cm hypoechoic mass in the head of the pancreas causing extrahepatic biliary obstruction and pancreatic ductal dilation.

Figure 3 Histologic section (H and E) of the pancreatic head tumor. Diffusely infiltrative tumor replacing parenchyma with focal remnants of normal appearing epithelial structures.

Figure 4 Typical DTF histology (H and E): Uniform sweeping fascicles of spindled myofibroblasts with low cellularity, no cellular atypia, minimal inflammation and scattered keloid-like collagen within a collagenous stroma.

Figure 5 Beta-catenin immunohistochemistry: Positive, diffuse, plump myofibroblast nuclear staining, faint cytoplasmic staining characteristic of desmoid type fibromatosis.