Musculoskeletal Key

(1) Department of Pathology and Orthopaedic Surgery, Johns Hopkins Hospital, Baltimore, MD, USA   Abstract Adamantinoma is a primary low-grade malignant bone tumor that has nests of epithelial cells in…

Fig. 14.1 AP radiograph (a) of a 15-year-old male shows a region of cortical thickening, aggressive periosteal reaction, and subtle matrix production along the medial aspect of the proximal tibial…

Fig. 33.1 (a) Macrophotography and (b) specimen radiograph of an epithelioid hemangioma of the distal femur with pathological fracture. The lesion has a hemorrhagic pattern and expands to soft tissue…

Fig. 63.1 (a–c) Subungual exostosis involving the distal phalanx of the great toe in 3 different patients Fig. 63.2 Subungual exostosis of the distal phalanx of the fifth toe Fig….

Fig. 43.1 Schwannoma of mandible. Panoramic radiograph showing a large lytic lesion at left Fig. 43.2 Periosteal schwannoma of femur. (a) Radiograph shows a translucent external indentation in the cortical…

Fig. 7.1 X-ray of the humerus. In the metaphyseal area, the sclerotic round intramedullary lesion corresponds to an enostoma Fig. 7.2 Enostoma located in the upper end of the femur….

Fig. 41.1 (a) Radiograph of a lipoma in the proximal end of the fibula with some central areas of calcification. (b) MPR CT of same case. Coronal view. (c) MRI…

Just as for osteosarcoma, fibrosarcoma has a preference for the metaphyses of long bones, especially the distal femur, with the proximal femur, distal humerus, proximal tibia, and pelvis following in…

Fig. 60.1 (a) X-ray and (b) CT scan showing an avulsion injury in the ischial tuberosity (ischial apophyseolysis), at the insertion of the hamstring muscles. Muscle contraction pulled off a…

Fig. 72.1 Erdheim-Chester disease of the distal femur. There is a poorly defined zone of increased radiodensity with cortical thickening. This change is identical to chronic osteomyelitis The cortices are…