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Bone
Bone forming tumors other than osteosarcoma
Osteoblastoma

Author: David Lucas, M.D. (see Reviewers page)
Revised: 12 August 2013, last major update February 2013
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.

See subtype below: aggressive osteoblastoma

General
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Terminology
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Epidemiology
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Sites
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Clinical features
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Diagnosis
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Radiology
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Prognostic factors
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Case reports
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Treatment
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Xray images
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T7 osteoblastoma with central nidus
Iliac osteoblastoma with sclerotic rim
Rib osteoblastoma suspicious for malignancy
Large periosteal osteoblastoma of femur
Great toe osteoblastoma
Sphenoid osteoblastoma
Osteoblastoma of tooth root
Pubic ramus expanded, cortex thinned
Contributed by Dr. Mark R. Wick
Talus - contributed by Dr. Mark R. Wick
Talus MRI - contributed by Dr. Mark R. Wick
Gross description
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Gross images
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Intracortical osteoblastoma of tibia
Osteoblastoma of clavicle
Spinal T7 osteoblastoma with central nidus involving pedicle
Osteoblastoma of ilium
Atypical type - contributed by Dr. Mark R. Wick
Contributed by Dr. Mark R. Wick
Micro description
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Micro images
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Osteoblastoma with cartilagenous matrix
Demarcated tumor with anastomosing trabeculae of osteoblastoma connecting to surrounding bone
Activated osteoblasts with eccentric cytoplasm and perinuclear hof, and large vesicular nuclei with prominent nucleoli
Anastomosing trabeculae rimmed by a single layer of osteoblasts with loose fibrovascular stroma and Pagetoid reversal lines
Central nidus of sclerotic woven bone
Solid area of an osteoblastoma
Osteoblastoma high power
Degenerative atypia
Various images (not on Flickr)
Atypical type - contributed by Dr. Mark R. Wick
Atypical type with epithelioid osteoblasts - contributed by Dr. Mark R. Wick
Contributed by Dr. Mark R. Wick
Talus - contributed by Dr. Mark R. Wick

Cytology description
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Cytology images
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Cytology smears
Differential diagnosis
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Additional references
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Aggressive osteoblastoma
General
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Terminology
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Epidemiology
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Sites
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Diagnosis
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Radiology
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Case reports
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Treatment
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Xray images
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Pelvic tumor
Maxillary tumor
Mandibular tumor
Expansile tibial tumor with central nidus
Gross description
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Gross images
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Expansile, demarcated tibial tumor with central nidus and intralesional hemorrhage
Micro description
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Micro images
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Sheet of epithelioid osteoblasts
Sheets of large, epithelioid osteoblasts
Immature trabeculae with osteoblastic rimming
Zonation of bone formation
Epithelioid multifocal pattern
Cellular fibrous connective tissue edge abutting bone-like tissue
Bone-like tissue with lacunar spaces containing large osteoblasts and osteoclasts
Bone-like tissue and lacunar spaces containing numerous plump osteoblasts
Sheets of epithelioid osteoblasts in lacunar spaces, bland nuclei
Molecular / cytogenetics description
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Differential diagnosis
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Additional references
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End of Bone > Bone forming tumors other than osteosarcoma > Osteoblastoma


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