case_images: PMC5598206_01
case_images: (a, b) Preoperative radiographs showed a well-circumscribed ovoid radiopaque mass.
case_images: sicotj-3-55-fig1_small.jpg
case_images: PMC5598206_01_sicotj-3-55-fig1_small.jpg
case_images: F1
case_images: Plain radiography showed a well-circumscribed ovoid radiopaque mass with a structure resembling that of cancellous bone with a thin cortical shell (Figures 1a and 1b).
case_images: (a, b) Preoperative MRT showed a well-circumscribed ovoid radiopaque mass confined to the iliopsoas muscle belly.
case_images: sicotj-3-55-fig2_small.jpg
case_images: PMC5598206_01_sicotj-3-55-fig2_small.jpg
case_images: F2
case_images: The MRT showed that the mass was confined to the iliopsoas muscle belly distal to the inguinal ligament with non-infiltrative growth and no perifocal edema in the surrounding muscle and it was displacing the femoral neurovascular bundle (Figures 2a and 2b).
case_images: (a, b) The photograph shows the mass consisting of cancellous bone with a thin cartilage-like covering.
case_images: sicotj-3-55-fig3_small.jpg
case_images: PMC5598206_01_sicotj-3-55-fig3_small.jpg
case_images: F3
case_images: When sectioned, it had cancellous bone structure and a thin cartilage-like covering thicker only in the proximal pole (Figures 3a and 3b).
case_images: (a-c) Microscopic appearance from different parts of the material revealed a well presented cap of hyaline cartilage gradually changing into trabecular bone (hematoxylin and eosin, x40).
case_images: sicotj-3-55-fig4_small.jpg
case_images: PMC5598206_01_sicotj-3-55-fig4_small.jpg
case_images: F4
case_images: Microscopy showed a typical structure of osteochondroma with thin mature cartilage at the periphery and cancellous bone with bone marrow in the intertrabecular spaces (Figures 4a-4c).