Abstract |
Extraskeletal osseous and cartilaginous tumors and tumorlike conditions of the extremities can often be differentiated radiologically; for those that cannot, knowledge of the spectrum of lesions will allow a suitably ordered differential diagnosis. Of the osseous lesions--myositis ossificans, fibro-osseous pseudotumor, fibrodysplasia ossificans progressiva, soft-tissue osteoma, and extraskeletal osteosarcoma--all but myositis ossificans are relatively rare. Myositis ossificans has a distinct mineralization pattern that can be observed radiologically as a peripheral rim of lamellar bone. Fibro-osseous pseudotumor typically occurs in the digits of the hand and lacks the well-defined zoning pattern of myositis ossificans. The cartilaginous entities include the true tumors, soft-tissue chondroma and extraskeletal chondrosarcoma, and the tumorlike process, synovial osteochondromatosis. The tumors are relatively rare; synovial osteochondromatosis commonly affects middle-aged men, especially in the knee, and is associated with osteoarthritis. The differential diagnosis for these extraskeletal osseous and cartilaginous lesions includes soft-tissue sarcoma, benign mesenchymoma, malignant mesenchymoma (rare), calcified tophi in gout, melorheostosis (rare), pilomatricoma (rare), and tumoral calcinosis (rare).
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Authors | M J Kransdorf, J M Meis |
Journal | Radiographics : a review publication of the Radiological Society of North America, Inc
(Radiographics)
Vol. 13
Issue 4
Pg. 853-84
(Jul 1993)
ISSN: 0271-5333 [Print] United States |
PMID | 8356273
(Publication Type: Journal Article)
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Topics |
- Adult
- Aged
- Chondroma
(diagnosis, diagnostic imaging, pathology)
- Chondromatosis, Synovial
(diagnosis, diagnostic imaging, pathology)
- Diagnosis, Differential
- Extremities
(diagnostic imaging, pathology)
- Female
- Humans
- Magnetic Resonance Imaging
- Male
- Middle Aged
- Myositis Ossificans
(diagnosis, diagnostic imaging, pathology)
- Neoplasms
(diagnosis, diagnostic imaging, pathology)
- Osteoma
(diagnosis, diagnostic imaging, pathology)
- Osteosarcoma
(diagnosis, diagnostic imaging, pathology)
- Soft Tissue Neoplasms
(diagnosis, diagnostic imaging, pathology)
- Tomography, X-Ray Computed
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