High-risk features in radiation-associated breast angiosarcomas

Area of Science:

• Oncology
• Surgical Oncology
• Radiation Oncology

Background:

• Radiation-associated breast angiosarcoma (RT-AS) is a rare malignancy, accounting for less than 1% of soft tissue sarcomas.
• Patients with RT-AS face a dismal prognosis, characterized by high recurrence rates and poor overall survival.
• Limited data exists on the clinical outcomes for patients diagnosed with breast RT-AS.

Purpose of the Study:

• To investigate the clinical outcomes of patients diagnosed with radiation-associated breast angiosarcoma.
• To identify prognostic factors influencing disease-specific survival in RT-AS patients.

Main Methods:

• A retrospective review of patients with RT-AS treated at Memorial Sloan-Kettering Cancer Center from 1982 to 2011.
• Collection and analysis of correlative clinical information for identified patients.

Main Results:

• Seventy-nine women with RT-AS were identified, with a median age of 68 years.
• The median interval between radiation exposure and RT-AS diagnosis was 7 years.
• High rates of local (1.29 years) and distant (2.48 years) recurrence were observed, with a median disease-specific survival of 2.97 years.
• Independent predictors of worse disease-specific survival included age ≥68 years and deep tumor location.

Conclusions:

• RT-AS exhibits high local and distant recurrence rates.
• Standard chemotherapy offers limited duration of benefit for RT-AS.
• The disease is associated with poor disease-specific survival, with age and tumor depth as significant prognostic factors.