Clinical significance of radiotherapy in patients with primary uterine carcinosarcoma: a multicenter retrospective study (KROG 13-08).

Adjuvant RT decreased the risk of locoregional recurrence after hysterectomy for UCS, particularly in patients without surgical nodal staging. Given the poorer locoregional outcomes of patients previously subjected to pelvic RT, meticulous re-administration of RT might improve locoregional control while leading to less toxicity in these patients.