Abstract
Purpose
We analyzed the diagnosis and the treatment outcomes of patients with central low grade osteosarcoma.
Materials and Methods
We retrospectively reviewed 16 patients with central low grade osteosarcoma were treated at out institution between 1994 and 2011.
Results
There were 4 men and 12 women with mean age of 26 years. Eleven patients were correctly diagnosed but 5 patients were misdiagnosed as osteoid osteoma, non ossifying fibroma, aneurysmal bone cyst, desmoplastic fibroma. 15 patients finally received wide margin en bloc excision and one of them treated under neoadjuvant chemotherapy. Final survival status was continuous disease free in 14 and 1 patient died of renal cell cancer. Remaining 1 with multifocal lesions is alive with disease for 7 years only treated radiation therapy on residual tumors. Nine (56%) of 16 tumors showed extraosseous extension of tumor (56%) and 1 of them showed extra-compartmental tumors.
Conclusion
The diagnosis of central low grade osteosarcoma is challenging, however, considering of the clinical suspicion, the typical findings of radiologic and pathologic features, proper diagnosis is needed. This tumor should be treated with wide excision, even after an intralesional excision, to avoid local recurrence or transformation to higher histologic grade.
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References
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![]() | Figure 1.Plain radiograph of a 21-year-old man showing expansile mixed osteolytic and sclerotic lesion in the distal meta-diaphysis of femur. Radiologic differential diagnosis included osteosarcoma, fibrosarcoma, adamantinoma, and giant osteoblastoma. |
![]() | Figure 3.Plain radiograph of a 20-year-old man showing predominantly lytic lesion in the distal femur. Radiologic differential diagnosis included osteosarcoma, fibrosarcoma, chondrosarcoma, and giant cell tumor with aneurismal bone cystic change. |
![]() | Figure 2.(A) Plain radiograph of a 19-year-old girl showing mixed osteolytic and sclerotic lesion in the proximal humerus. (B) The typical histologic appearance of low-grade osteosarcoma, permeation of osseous trabeculae by spindle cell stroma (hematoxylin-eosin, ×100). |
![]() | Figure 4.(A) Plain radiograph of a 54-year-old woman showing sclerotic lesion in the distal femur. (B) Mature bone trabeculae is admixed with permeating spindle cell stroma (×100). |
Table 1.
Patient Characteristics and Radiologic Feature
Table 2.
Surgical Procedure, Immune-Histochemical Analysis, and Clinical Course
Table 3.
Comparison with Previous Studies
Author | Number of patients | Definitive treatment | Intralesional operation* (%) | Chemotherpy | LR† | Metastasis | Final status |
---|---|---|---|---|---|---|---|
Current study | 16 | 13/3 | 3/16 (19%) | 1/16 (6%) | 0% | 0% | NED (15), DOC (1), AWD (1) |
Choong et al8) | 20 | 12/8 | 12/20 (60%) | – | 14% | 20% | NED (16), DOD (4) |
Malhas et al12) | 18 | 11/7 | 10/18 (56%) | 7/18 (39%) | 11% | 11% | NED (16), AWD (1), DOD (1) |
Yoshida et al14) | 9 | 3/6 | 3/9 (33%) | 5/9 (56%) | 14% | 43% | NED (4), AWD (2), DOD (1) |
Dujardin et al18) | 6 | NA | NA | NA | NA | NA | NA |
Hayashi et al13) | 5 | NA | 2/5 (40%) | NA | 0% | 0% | NED (5) |