osteoblastoma


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Related to osteoblastoma: osteochondroma, enchondroma, chondroblastoma

osteoblastoma

 [os″te-o-blas-to´mah]
a benign, painful, rather vascular tumor of bone marked by formation of osteoid tissue and primitive bone.

os·te·o·blas·to·ma

(os'tē-ō-blas-tō'mă),
An uncommon benign tumor of osteoblasts with areas of osteoid and calcified tissue, occurring most frequently in the spine of a young person.

osteoblastoma

/os·teo·blas·to·ma/ (os″te-o-blas-to´mah) a benign, painful, rather vascular tumor of bone marked by formation of osteoid tissue and primitive bone.

osteoblastoma

[-blastō′mə] pl. osteoblastomas, osteoblastomata
a small, benign, fairly vascular tumor of poorly formed bone and fibrous tissue, occurring most frequently in the vertebrae, femur, tibia, or bones of the upper extremities in children and young adults. The tumor may cause pain, erosion, and resorption of native bone. Excision is the preferred treatment. Also called osteoid osteoma.

osteoblastoma

A bone lesion which is traditionally defined as a benign tumour of highly vascularised osteoblastic stroma, which is most common between age 5 and 25, and often located in vertebrae.
 
DiffDx
• Osteoid osteoma: Osteoblastomas are larger (over 2 cm in diameter), more axial in location, and lack imaging appearance of OOs.
• Osteosarcoma: Osteoblastomas are non-invasive, lack cartilage, have an osteosclerotic rim and looser cellularity.
• Pseudomalignant osteoblastoma: Osteoblastomas lack plump osteoblasts with “ancient change”—large nuclei with smudged nuclei.

os·te·o·blas·to·ma

(os'tē-ō-blas-tō'mă)
An uncommon benign tumor of osteoblasts with areas of osteoid and calcified tissue, occurring most frequently in the spine of a young person.

osteoblastoma (os´tēōblas´tōmə),

n a bone tumor benign in nature but characterized by swelling and chronic dull pain. If left untreated, these tumors lead to such conditions as scoliosis.

osteoblastoma

a giant osteoid osteoma; a benign, painful, rather vascular enostotic tumor of bone characterized by trabeculae of osteoid produced by well-developed osteoblasts. It has not been described in animals.
References in periodicals archive ?
Osteoid osteomas and osteoblastomas are benign bone tumors and are considered variants of the same histopathology, differing only in size.
This modality can better delineate the size of a nidus in osteoid osteoma or osteoblastoma, cortical thinning in an aneurysmal bone cyst, or to look for lung metastasis.
Osteoblastoma is rare, accounting for only 1% of primary bone tumors.
The above histologic features were consistent with osteoblastoma (Fig.
His lumbosacral CT was taken and then a tumoral mass was noticed enlarging transverse process and right lamina of L5 vertebrae with probable diagnosis of osteoblastoma or osteoid osteoma.
Osteoblastoma has increased cellularity with haphazard proliferation of prominent, although loose, intervening fibrovascular-tissue stroma and interlacing trabeculae of osteoid.
On imaging, both involved the medullary compartment and had imaging findings that were consistent with osteoblastoma.
A review of osteoblastoma and case report of metachronous osteoblastoma and unicystic ameloblastoma.
Epithelioid and epithelial neoplasms seen in bone are rare and include epithelioid variants of vascular lesions, osteoblastoma, osteosarcoma, chordoma, and chondroblastoma as well as adamantinoma and metastatic carcinoma.
Pathologically, the differential diagnoses of osteoma include ossifying fibroma, osteoblastoma, osteosarcoma, and chondrosarcomatous osteosarcoma.
The differential diagnosis includes primary neural tumors (schwannoma, neurofibroma, meningioma, ependymoma), primary osseous tumors (giant cell tumor, chordoma, aneurysmal bone cyst, osteoblastoma, lymphoma, and chondrosarcoma), metastases, and myeloma.