A low-grade extraskeletal osteosarcoma

Kyoji Okada, Hiroki Ito, Naohisa Miyakoshi, Masato Sageshima, Jun Nishida, Eiji Itoi

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


The case of a 35-year-old woman with low-grade extraskeletal osteosarcoma of the left leg is presented. Radiographs showed peripheral ossification of the lesion, suggesting myositis ossificans. Most of the tumor was composed of cartilage, and the cellularity and cell atypia of the proliferating chondrocytes were mild to moderate. In the periphery, bone formation with a relatively clear margin and proliferation of spindle cells with minimal nuclear atypia were observed. The average percentage of cells positive for MIB-1 was 9.0%. A diagnosis of low-grade extraskeletal osteosarcoma was made on the basis of these histologic findings. The clinical course 47 months after a wide excision was uneventful.

Original languageEnglish
Pages (from-to)165-169
Number of pages5
JournalSkeletal Radiology
Issue number3
Publication statusPublished - 2003 Mar 1
Externally publishedYes


  • Leg
  • Low-grade extraskeletal osteosarcoma
  • MRI
  • Sarcoma
  • Soft tissue

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


Dive into the research topics of 'A low-grade extraskeletal osteosarcoma'. Together they form a unique fingerprint.

Cite this