TABLE 1.
FIGO staging classification for cancer of the ovary, fallopian tube, and peritoneum
| Stage I: Tumor confined to ovaries or fallopian tube(s) | T1‐N0‐M0 |
|---|---|
| IA: Tumor limited to 1 ovary (capsule intact) or fallopian tube; no tumor on ovarian or fallopian tube surface; no malignant cells in the ascites or peritoneal washings | T1a‐N0‐M0 |
| IB: Tumor limited to both ovaries (capsules intact) or fallopian tubes; no tumor on ovarian or fallopian tube surface; no malignant cells in the ascites or peritoneal washings | T1b‐N0‐M0 |
| IC: Tumor limited to 1 or both ovaries or fallopian tubes, with any of the following: | |
| IC1: Surgical spill | T1c1‐N0‐M0 |
| IC2: Capsule ruptured before surgery or tumor on ovarian or fallopian tube surface | T1c2‐N0‐M0 |
| IC3: Malignant cells in the ascites or peritoneal washings | T1c3‐N0‐M0 |
| Stage II: Tumor involves 1 or both ovaries or fallopian tubes with pelvic extension (below pelvic brim) or peritoneal cancer | T2‐N0‐M0 |
| IIA: Extension and/or implants on uterus and/or fallopian tubes and/or ovaries | T2a‐N0‐M0 |
| IIB: Extension to other pelvic intraperitoneal tissues | T2b‐N0‐M0 |
| Stage III: Tumor 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 | T1‐3/N0‐1/M0 |
| IIIA1: Positive retroperitoneal lymph nodes only (cytologically or histologically proven): | T1/T2‐N1‐M0 |
| 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 | T3a2‐N0/N1‐M0 |
| IIIB: Macroscopic peritoneal metastasis beyond the pelvis up to 2 cm in greatest dimension, with or without metastasis to the retroperitoneal lymph nodes | T3b‐N0/N1‐M0 |
| 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 tumor to capsule of liver and spleen without parenchymal involvement of either organ) | T3c‐N0/N1‐M0 |
| Stage IV: Distant metastasis excluding peritoneal metastases | Any T, any N, M1 |
| Stage IVA: Pleural effusion with positive cytology | |
| Stage IVB: Parenchymal metastases and metastases to extra‐abdominal organs (including inguinal lymph nodes and lymph nodes outside of the abdominal cavity) |