Abstract
Aggressive (epithelioid) osteoblastoma arising in soft tissue has never been described. It is important to differentiate this benign osteoblastoma, a potentially locally aggressive tumor, from extraskeletal osteosarcoma. This report describes an aggressive (epithelioid) osteoblastoma arising in a focus of heterotopic ossification in the axilla of a 21-year-old man.
MeSH terms
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Adult
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Axilla
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Bone Neoplasms / chemistry
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Bone Neoplasms / diagnosis*
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Bone Neoplasms / surgery
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Disease-Free Survival
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Epithelioid Cells / pathology*
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Humans
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Immunohistochemistry
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Male
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Ossification, Heterotopic / pathology*
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Osteoblastoma / chemistry
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Osteoblastoma / diagnosis*
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Osteoblastoma / surgery
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Radiography
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Shoulder / diagnostic imaging
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Soft Tissue Neoplasms / chemistry
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Soft Tissue Neoplasms / diagnosis*
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Soft Tissue Neoplasms / surgery