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osteoblastoma

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<span class="search-highlight">OSTEOBLASTOMA</span>  A: The <span class="search-highlight">osteoblastoma</span> is confined by a layer of reactive sub ...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-38 OSTEOBLASTOMA A: The osteoblastoma is confined by a layer of reactive sub periosteal bone. The tumor is solid and composed of inter connecting trabeculae of woven bone. B: Islands of cellular tumor contain mineralized bone, well-defined by subperiosteal reactive bone. ... More about this image found in OSTEOBLASTOMA A: The osteoblastoma is confined by a layer of reactive sub ...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>-LIKE OSTEOSARCOMA  Left: <span class="search-highlight">Osteoblastoma</span>-like osteosarcoma grow...
Published: 01 October 2021
OSTEOBLASTOMA-LIKE OSTEOSARCOMA Figure 5-34 OSTEOBLASTOMA-LIKE OSTEOSARCOMA Left: Osteoblastoma-like osteosarcoma grows with an infiltrative pattern, encasing preexisting bone. Right: Neoplastic bone is rimmed by plump osteoblasts. The intertrabecular spaces contain loose connective tissue with ... More about this image found in OSTEOBLASTOMA-LIKE OSTEOSARCOMA Left: Osteoblastoma-like osteosarcoma grow...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  Ki-67 immunohistochemical stain of conventional osteoblastom...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-45 OSTEOBLASTOMA Ki-67 immunohistochemical stain of conventional osteoblastoma shows that many tumor cells are positive. More about this image found in OSTEOBLASTOMA Ki-67 immunohistochemical stain of conventional osteoblastom...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  A: A sheet-like deposit of woven bone is seen.  B: Neoplasti...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-40 OSTEOBLASTOMA A: A sheet-like deposit of woven bone is seen. B: Neoplastic rimming osteoblasts are of medium size with abundant eosinophilic to amphophilic cytoplasm. Many nuclei are polarized away from the bone-forming surface. Scattered osteoclasts are present on the ... More about this image found in OSTEOBLASTOMA A: A sheet-like deposit of woven bone is seen. B: Neoplasti...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 8
Published: 01 October 2021
10.55418/9781933477138-04
ISBN-10: 1-933477-13-X
ISBN: 978-1-933477-13-8
.... The bone in bone island and osteoma is usually cortical in structure and predominately lamellar in composition. They are some of the few tumors in which neoplastic bone is cortical and lamellar. In osteoid osteoma and osteoblastoma, the bone is trabecular in configuration and woven in pattern...
Images
Images
<span class="search-highlight">OSTEOBLASTOMA</span> WITH CARTILAGE  Left: Nodule of well-formed hyaline cartilage...
Published: 01 October 2021
OSTEOBLASTOMA WITH CARTILAGE Figure 4-42 OSTEOBLASTOMA WITH CARTILAGE Left: Nodule of well-formed hyaline cartilage abuts neoplastic bone. Right: In areas, the cartilage merges with the tumor bone. More about this image found in OSTEOBLASTOMA WITH CARTILAGE Left: Nodule of well-formed hyaline cartilage...
Images
<span class="search-highlight">OSTEOBLASTOMA</span> WITH PSEUDOMALIGNANT CHANGE  Left: Neoplastic osteoblasts hav...
Published: 01 October 2021
OSTEOBLASTOMA WITH PSEUDOMALIGNANT CHANGE Figure 4-44 OSTEOBLASTOMA WITH PSEUDOMALIGNANT CHANGE Left: Neoplastic osteoblasts have enlarged hyperchromatic nuclei. Right: The nuclear enlargement, hyperchromasia, smudging, and vacuolization in pseudomalignant change is hypothesized to be related to... More about this image found in OSTEOBLASTOMA WITH PSEUDOMALIGNANT CHANGE Left: Neoplastic osteoblasts hav...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  Left: Frontal radiograph of the spine showing loss of normal...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-31 OSTEOBLASTOMA Left: Frontal radiograph of the spine showing loss of normal outline of the left T11 pedicle (white arrow), indicative of destruction of the pedicle by tumor. Right: Sagittal fat-suppressed T2-weighted MRI shows an expansile, well-defined mass with fluid-f... More about this image found in OSTEOBLASTOMA Left: Frontal radiograph of the spine showing loss of normal...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  Left: Frontal radiograph shows an intramedullary lytic and s...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-35 OSTEOBLASTOMA Left: Frontal radiograph shows an intramedullary lytic and sclerotic lesion that extends through the cortex, displaces the periosteum, and has deposited a rim of reactive bone. The margins are difficult to appreciate. Right: Coronal fat suppressed T2-weigh... More about this image found in OSTEOBLASTOMA Left: Frontal radiograph shows an intramedullary lytic and s...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  A: Needle biopsy specimen shows aggregates of tumor well del...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-39 OSTEOBLASTOMA A: Needle biopsy specimen shows aggregates of tumor well delineated from subperiosteal reactive bone. B: Haphazardly oriented trabeculae of woven bone are prominently rimmed by plump osteoblasts. The intertrabecular tissue is composed of loose vascular con... More about this image found in OSTEOBLASTOMA A: Needle biopsy specimen shows aggregates of tumor well del...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  A: Lateral radiograph of the elbow shows a mixed lytic and s...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-36 OSTEOBLASTOMA A: Lateral radiograph of the elbow shows a mixed lytic and sclerotic lesion arising from the proximal ulna and extending into the adjacent soft tissues. Associated osteopenia is present. B: Axial T2-weighted MRI shows multiple fluid-fluid levels (ABC-like ... More about this image found in OSTEOBLASTOMA A: Lateral radiograph of the elbow shows a mixed lytic and s...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  A: Axial CT image shows a large tumor of the occiput that is...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-34 OSTEOBLASTOMA A: Axial CT image shows a large tumor of the occiput that is delineated peripherally by a thin rim of reactive bone. Most of the tumor is low in attenuation. An area of high attenuation represents neoplastic bone. B: Axial T2-weighted MRI shows that much o... More about this image found in OSTEOBLASTOMA A: Axial CT image shows a large tumor of the occiput that is...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  A: Axial CT image of the cervical spine shows an expansile w...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-32 OSTEOBLASTOMA A: Axial CT image of the cervical spine shows an expansile well-defined mixed sclerotic and lytic tumor of the left pedicle and spinous process. B: Frontal radiograph of the knee shows a mildly expansile, well-defined lytic lesion involving the distal femo... More about this image found in OSTEOBLASTOMA A: Axial CT image of the cervical spine shows an expansile w...
Images
<span class="search-highlight">OSTEOBLASTOMA</span>  A: Oblique radiograph of the hip shows a mixed lytic and scl...
Published: 01 October 2021
OSTEOBLASTOMA Figure 4-33 OSTEOBLASTOMA A: Oblique radiograph of the hip shows a mixed lytic and sclerotic lesion involving the lesser trochanter. The periphery of the tumor is not surrounded by a rim of reactive bone. B: Coronal reformatted CT image shows a heterogeneous ill-defined lesion cent... More about this image found in OSTEOBLASTOMA A: Oblique radiograph of the hip shows a mixed lytic and scl...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 8
Published: 01 October 2021
10.55418/9781933477138-02
ISBN-10: 1-933477-13-X
ISBN: 978-1-933477-13-8
... signaling:   Translocations resulting in gene over-expression Aneurysmal bone cyst (USP6) Chondromyxoid fibroma (GRM1) Osteoblastoma (FOS)   Specific amplifications/gains Chordoma (6q27 T [encoding brachyury]) Low-grade (parosteal...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 8
Published: 01 October 2021
10.55418/9781933477138-05
ISBN-10: 1-933477-13-X
ISBN: 978-1-933477-13-8
... ). In the osteoblastoma-like variant, the tumor cells may be deceptively banal and rim neoplastic bony trabeculae in a fashion that mimics osteoblastoma ( fig. 5-34 ). Features that permit their distinction are the permeative growth pattern and solid cellular intertrabecular tissue that are found in osteosarcoma...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 8
Published: 01 October 2021
10.55418/9781933477138-01
ISBN-10: 1-933477-13-X
ISBN: 978-1-933477-13-8
... such as chondroblastoma, osteoblastoma, aneurysmal bone cyst, and giant cell tumor is 10 to 20 percent. The prognosis of patients with sarcoma also depends on the specific type, size, location, grade, and stage of the tumor. For some tumors, such as osteosarcoma and Ewing sarcoma, other variables, including patient age...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 8
Published: 01 October 2021
10.55418/9781933477138-14
ISBN-10: 1-933477-13-X
ISBN: 978-1-933477-13-8
..., chondromyxoid fibroma, and osteoblastoma; however, it also can be seen in malignant tumors such as osteosarcoma. Aneurysmal bone cyst needs to be thoroughly sampled microscopically, especially the solid component of the tumor, to exclude an underlying primary lesion, which determines the clinical behavior...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 8
Published: 01 October 2021
10.55418/9781933477138-03
ISBN-10: 1-933477-13-X
ISBN: 978-1-933477-13-8
... tumors, such as osteoid osteoma, osteoblastoma, and fracture callus formation ( fig. 3-18 ). SOLID PERIOSTEAL REACTION Figure 3-18 SOLID PERIOSTEAL REACTION Radiograph of the humerus of a patient with osteoid osteoma (arrowhead) demonstrates thick and solid periosteal reaction (arrows), suggestive...