J Korean Soc Radiol.  2011 Dec;65(6):603-605. 10.3348/jksr.2011.65.6.603.

Primary Osteoblastic Osteosarcoma of the Rib in an Adult: A Case Report

• Ryoo I
• Choi JA
• Park HJ
• Chung JH
• Oh JH
• Kang HS

• KMID: 2002929
• DOI: http://doi.org/10.3348/jksr.2011.65.6.603

Abstract

We report the CT and magnetic resonance (MR) imaging appearances in an adult case of primary osteoblastic osteosarcoma of the rib. Osteosarcoma of the rib presents a diagnostic challenge because of the rarity of the lesion, especially with plain radiographs. The tumor should be suspected if CT and MR images demonstrate mineralization, suggestive of an osteoid matrix.

MeSH Terms

Adult
Humans
Magnetic Resonance Spectroscopy
Osteoblasts
Osteosarcoma
Ribs

Figure

• 

  Fig. 1 Radiograph, CT, MRI, and histopathologic specimen images of 31-year-old woman with osteoblastic osteosarcoma of the rib. A. Chest radiograph shows non homogenous calcification (white arrowheads) involving the right 10th rib. B. CT scan of chest shows the tumor mass with central dense calcification (white arrowheads). C. Axial T2-weighted image shows the tumor (white arrowheads) with extensive central signal loss due to dense calcification. D. Axial T1-weighted image shows intermediate signal intensity lesion (white arrowheads) with multiple central signal void areas. E. Axial T1-weighted contrast-enhanced image shows well enhancing portions of the soft tissue mass of the tumor (white arrowheads). F. Gross specimen image shows lobulated mass with mineralized matrix. G. Mineralized (open arrows) or unmineralized (arrow) osteoid is haphazardly distributed and neoplastic hyperchromatic cells (arrowhead) are noted between the osteoid (H&E, × 200).

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