Eduardo Antonio Guerrero LizcanoYuli Natalia Otero PabonJavier Rodríguez CorredorSantiago Ardila GiraldoAndrés Ilich González RamírezSofía Dávila Garzón2026-01-292026-01-292025-12-07https://hdl.handle.net/20.500.14595/907Chylous ascites is a rare postoperative complication, typically associated with extensive abdominal procedures and caused by inadvertent injury to the retroperitoneal lymphatic vessels. Its management represents a therapeutic challenge, particularly in cases refractory to conventional strategies. We present the case of a patient with persistent lymphatic leakage following retroperitoneal lymphadenectomy for recurrent testicular cancer, who failed multiple standard interventions. Given the refractory nature of the condition, low-dose external beam radiotherapy was administered, resulting in complete resolution with no recurrence at two-year follow-up. This case highlights radiotherapy as a potentially effective therapeutic option for the management of lymphatic fistulas.enlymphatic fistulalymphoscintigraphypostoperative chylous ascitesradiation theraphyrefractory ascites