NCIt definition : Stage IIIB includes: T3b, N0/N1, M0. T3b: Ovarian cancer with macroscopic peritoneal
metastasis beyond pelvis 2 cm or less in greatest dimension with or without metastasis
to the retroperitoneal lymph nodes. N0: No regional lymph node metastasis. N1: Positive
retroperitoneal lymph nodes only (histologically confirmed). M0: No distant metastasis.
(AJCC 8th Ed.);