OSTEOMA Figure 4-17 OSTEOMA Top: Dense cortical-like bone of osteoma adjacent to underlying cortex and attached to cancellous bone. Bottom: Mixed cortical and trabecular osteoma of long bone containing abundant cancellous bone. More about this image found in OSTEOMA Top: Dense cortical-like bone of osteoma adjacent to underlying co...

OSTEOMA Figure 4-10 OSTEOMA Osteoma of frontal bone produces a visible protuberance. More about this image found in OSTEOMA Osteoma of frontal bone produces a visible protuberance.

OSTEOMA Figure 4-11 OSTEOMA Left: Axial CT shows large, oval, smooth-surfaced osteoma of skull. The tumor is homogeneously radiodense. Right: Axial CT image shows radio dense tumor filling the frontal sinus and causing mass effect onto the brain. More about this image found in OSTEOMA Left: Axial CT shows large, oval, smooth-surfaced osteoma of skull...

OSTEOMA Figure 4-15 OSTEOMA Smooth convex surface of osteoma from the orbit. More about this image found in OSTEOMA Smooth convex surface of osteoma from the orbit.

OSTEOMA Figure 4-16 OSTEOMA Osteoma of long bone is elongated and has a bosselated smooth surface. More about this image found in OSTEOMA Osteoma of long bone is elongated and has a bosselated smooth surf...

OSTEOMA Figure 4-18 OSTEOMA A: Osteoma consists of compact bone with haversian systems of varying size. B: The bone is predominately lamellar and focally woven in architecture. C: Mixed cortical and trabecular osteoma covered by periosteum. D: Trabeculae are rimmed by osteoblasts and surrounde... More about this image found in OSTEOMA A: Osteoma consists of compact bone with haversian systems of vary...

OSTEOID OSTEOMA Figure 4-24 OSTEOID OSTEOMA Top: Serial cross section of osteoid osteoma located in the cortex of the tibia. The tumor is round and red, with a white-tan center. The normal cortex is apparent (white arrows) and is surrounded by a thick layer of periosteal bone. Bottom: Resected t... More about this image found in OSTEOID OSTEOMA Top: Serial cross section of osteoid osteoma located in th...

OSTEOID OSTEOMA Figure 4-29 OSTEOID OSTEOMA Infrequently, osteoid osteoma has cartilage as a portion of the matrix. More about this image found in OSTEOID OSTEOMA Infrequently, osteoid osteoma has cartilage as a portion o...

OSTEOMA Figure 4-13 OSTEOMA A: Frontal radiograph of the femur shows an oval radiodense mass on the surface of the femoral diaphysis with a smooth contour. B: Radiograph of cancellous osteoma arising from the parietal bone. C: Axial CT image shows an osteoma with a trabecular component anchored... More about this image found in OSTEOMA A: Frontal radiograph of the femur shows an oval radiodense mass o...

OSTEOMA Figure 4-14 OSTEOMA Top: Axial CT image shows the mixed cortical and trabecular pattern, attached to the inner surface of calvarium. Bottom: Cross section through osteoma with outer cortical and inner trabecular areas. More about this image found in OSTEOMA Top: Axial CT image shows the mixed cortical and trabecular patter...

OSTEOID OSTEOMA Figure 4-20 OSTEOID OSTEOMA Left: Frontal radiograph of the spine showing levoconvex scoliosis caused by muscle spasm induced by painful osteoid osteoma. Above: Reformatted sagittal CT image shows a well-defined, round sclerotic lesion in the pedicle and lamina (arrow). More about this image found in OSTEOID OSTEOMA Left: Frontal radiograph of the spine showing levoconvex s...

OSTEOID OSTEOMA Figure 4-25 OSTEOID OSTEOMA Oval tumor is demarcated from surrounding cortex. More about this image found in OSTEOID OSTEOMA Oval tumor is demarcated from surrounding cortex.

OSTEOID OSTEOMA Figure 4-30 OSTEOID OSTEOMA Scattered tumor cells have positive nuclear staining for FOS. More about this image found in OSTEOID OSTEOMA Scattered tumor cells have positive nuclear staining for F...

OSTEOID OSTEOMA Figure 4-28 OSTEOID OSTEOMA Numerous capillaries fill the intertrabecular space and supply nutrients to the tumor cells. More about this image found in OSTEOID OSTEOMA Numerous capillaries fill the intertrabecular space and su...

OSTEOID OSTEOMA Figure 4-26 OSTEOID OSTEOMA Left: The tumor is characterized by randomly oriented interconnecting trabeculae of woven bone. Right: Sometimes the neoplastic bone is sheet-like in architecture. More about this image found in OSTEOID OSTEOMA Left: The tumor is characterized by randomly oriented inte...

OSTEOMA Figure 4-12 OSTEOMA A: Solid mass of cortical bone on the surface of a rib. B: Accompanying axial CT image displays the homogeneous radiodensity of the tumor. C: The tumor is composed of an aggregate of cortical-like bone. More about this image found in OSTEOMA A: Solid mass of cortical bone on the surface of a rib. B: Accomp...

OSTEOID OSTEOMA Figure 4-22 OSTEOID OSTEOMA Left: Radiograph of the femur demonstrates a well-defined oval radiolucent lesion with surrounding sclerotic bone. Right: Reformatted coronal CT image shows that the lesion is juxtacortical and surrounded by abundant well-formed reactive bone. More about this image found in OSTEOID OSTEOMA Left: Radiograph of the femur demonstrates a well-defined ...

OSTEOID OSTEOMA Figure 4-21 OSTEOID OSTEOMA Left: Frontal radiograph of the leg shows an oval, lytic, sharply demarcated, metadiaphyseal subperiosteal tumor in a child (arrows). The tumor is surrounded by well-formed homogeneous subperiosteal reactive bone (arrowheads). Above: Axial CT image sho... More about this image found in OSTEOID OSTEOMA Left: Frontal radiograph of the leg shows an oval, lytic, ...

OSTEOID OSTEOMA Figure 4-23 OSTEOID OSTEOMA A: CT tomogram of the femur demonstrates a dense convex periosteal reaction on the lateral femoral diaphysis with a subtle central lucency (arrow). B: Coronal STIR MRI shows bone marrow edema. C: Axial CT image demonstrates well-defined round intracor... More about this image found in OSTEOID OSTEOMA A: CT tomogram of the femur demonstrates a dense convex pe...