An unforgiving sequela: recurrent radiation-associated sarcoma of the vulva

Background: Radiation-associated sarcomas are rare but aggressive malignancies that can arise as a late complication of radiotherapy. Vulvar sarcomas are particularly uncommon and pose significant diagnostic and therapeutic challenges due to high rates of recurrence and the anatomic complexity of surgical management. Case: We report the case of a 64-year-old woman who developed a high-grade radiation-associated spindle cell sarcoma of the vulva three years after definitive treatment for stage IIIA squamous cell carcinoma of the vulva. Despite multiple surgical resections with initially negative margins, the disease demonstrated rapid and repeated local recurrence, requiring repeated resections including an anterior pelvic exenteration. Although pathology at the time of exenteration confirmed negative margins with no evidence of disease, the patient developed biopsy-proven metastatic sarcoma within five months and was initiated on systemic therapy. She experienced adverse events from systemic treatment, and ultimately opted for home hospice. Conclusion: This case highlights the aggressive clinical behavior of radiation-associated vulvar sarcomas and the limitations of local surgical control despite radical intervention. Early recognition, close surveillance, and a multidisciplinary treatment approach are essential, and further research is needed to define optimal management strategies for this rare entity.