Ovarian, fallopian tube and primary peritoneal carcinoma (ICD10 C56, C57, C48.1, C48.2)

Tumour confined to ovaries or fallopian tube(s)

IA - Tumour limited to 1 ovary (capsule intact) or fallopian tube; no tumour on ovarian or fallopian tube surface; no malignant cells in the ascites or peritoneal washings

IB - Tumour limited to both ovaries (capsules intact) or fallopian tubes; no tumour on ovarian or fallopian tube surface; no malignant cells in the ascites or peritoneal washings

IC1 - Surgical spill

IC2 - Capsule ruptured before surgery or tumour on ovarian or fallopian tube surface

IC3 - Malignant cells in the ascites or peritoneal washings

Tumour involves 1 or both ovaries or fallopian tubes with pelvic extension (below pelvic brim) or peritoneal cancer

IIA - Extension and/or implants on uterus and/or fallopian tubes and/or ovaries

IIB - Extension to other pelvic intraperitoneal tissues

Tumour involves 1 or both ovaries or fallopian tubes, or peritoneal cancer, with cytologically or histologically confirmed spread to the peritoneum outside the pelvis and/or metastasis to the retroperitoneal lymph nodes

IIIA1 - Positive retroperitoneal lymph nodes only (cytologically or histologically proven):

IIIA1(i) - Metastasis up to 10 mm in greatest dimension

IIIA1(ii) - Metastasis more than 10 mm in greatest dimension

IIIA2 - Microscopic extrapelvic (above the pelvic brim) peritoneal involvement with or without positive retroperitoneal lymph nodes

IIIB - Macroscopic peritoneal metastasis beyond the pelvis up to 2 cm in greatest dimension, with or without metastasis to the retroperitoneal lymph nodes

IIIC - Macroscopic peritoneal metastasis beyond the pelvis more than 2 cm in greatest dimension, with or without metastasis to the retroperitoneal lymph nodes (includes extension of tumour to capsule of liver and spleen without parenchymal involvement of either organ)

Distant metastasis excluding peritoneal metastases

IVA - Pleural effusion with positive cytology

IVB - Parenchymal metastases and metastases to extra-abdominal organs (including inguinal lymph nodes and lymph nodes outside of the abdominal cavity)