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Pediatric Craniofacial Osteosarcoma: The Milano Experience.

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This study on craniofacial osteosarcoma (CFOS) found that unfavorable tumor sites and high-grade (G4) tumors are linked to poorer outcomes. Radiotherapy (RT) is recommended for positive surgical margins in CFOS patients.

Keywords:
chemotherapygradinghistologic subtypeosteosarcomaprimary tumor siteradiotherapysequelaesurgery

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Area of Science:

  • Oncology
  • Surgical Pathology
  • Cancer Treatment

Background:

  • Craniofacial osteosarcoma (CFOS) is a rare malignancy.
  • Typically affects older adults, but this study focused on younger patients.
  • Low incidence of metastasis at diagnosis and relapse.

Purpose of the Study:

  • To analyze treatment and outcomes for high-grade CFOS.
  • To identify prognostic factors in CFOS patients.
  • To evaluate the role of chemotherapy, surgery, and radiotherapy in CFOS management.

Main Methods:

  • Retrospective analysis of 11 high-grade CFOS patients treated between 1991-2021.
  • Evaluation of histological characteristics, tumor site, and grade (G3/G4).
  • Assessment of systemic (chemotherapy) and local (surgery, radiotherapy) treatment efficacy.

Main Results:

  • Median age of patients was 15 years.
  • Unfavorable factors included maxilla/cranial fossa/skull sites, chondroblastic histology, and G4 grade.
  • Five-year progression-free survival (PFS) was 50% for unfavorable sites and 25% for G4 tumors.
  • Clear surgical margins were achieved in 8/11 patients.
  • Two patients with R1 surgery and adjuvant RT survived disease-free.

Conclusions:

  • Unfavorable tumor sites and G4 tumors indicate a worse prognosis in CFOS.
  • Radiotherapy should be considered for R1 surgical margins.
  • Management of rare and complex CFOS cases requires specialized head and neck sarcoma centers.