Fallopian Tube Cancer Staging 

Updated: Dec 31, 2015
  • Author: from Memorial Sloan-Kettering - Elizabeth L Jewell, MD, MHSc; Chief Editor: from Memorial Sloan-Kettering - Yukio Sonoda, MD  more...
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TNM and FIGO Staging of Fallopian Tube Cancer

Because the fallopian tube is an open lumen, fallopian tube carcinoma has the ability to spread within the peritoneal cavity; consequently, surgical staging is required. [1] The TNM and International Federation of Gynecology and Obstetrics (FIGO) classifications for staging fallopian tube cancer are listed below (see Table 1) [2] ; however, modified FIGO staging (see Table 2) has been recommended as better reflecting tumor histology and patient outcome. [3]

Table 1. TNM and FIGO Staging of Fallopian Tube Cancer (Open Table in a new window)

Primary tumor (T)
TNM FIGO Definition
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
Tis*   Carcinoma in situ (limited to tubal mucosa)
T1 I Tumor limited to the fallopian tube(s)
T1a IA Tumor limited to 1 tube, without penetrating the serosal surface; no ascites
T1b IB Tumor limited to both tubes, without penetrating the serosal surface; no ascites
T1c IC Tumor limited to 1 or both tubes, with extension onto or through the tubal serosa or with malignant cells in ascites or peritoneal washings
T2 II Tumor involves 1 or both fallopian tubes, with pelvic extensions
T2a IIA Extension or metastasis to the uterus or the ovaries
T2b IIB Extension to other pelvic structures
T2c IIC Pelvic extension, with malignant cells in ascites or peritoneal washings
T3 III Tumor involves 1 or both fallopian tubes, with peritoneal implants outside the pelvis
T3a IIIA Microscopic peritoneal metastasis outside the pelvis
T3b IIIB Macroscopic peritoneal metastasis outside the pelvis ≤2 cm in greatest diameter
T3c IIIC Macroscopic peritoneal metastasis outside the pelvis and >2 cm in diameter
Regional lymph nodes (N)
TNM FIGO Definition
NX   Regional lymph nodes cannot be assessed
N0   No regional lymph node metastasis
N1 IIIC Regional lymph node metastasis
Distant metastasis (M)
TNM FIGO Definition
M0   No distant metastasis
M1 IV Distant metastasis (excluding metastasis with the peritoneal cavity)
* FIGO no longer considers stage 0 (Tis).



Metastasis to the liver surface (capsule) is considered T3, stage III; metastasis to the liver parenchyma is M1, stage IV. A pleural effusion with positive cytology results is M1, stage IV.



Table 2. Modified FIGO Staging of Fallopian Tube Cancer (Open Table in a new window)

Modified FIGO Definition
I Tumor limited to the fallopian tube(s)
IA Tumor limited to 1 tube, without penetrating the serosal surface; no ascites
IA-0 Tumor limited to 1 tube, with no extension into the lamina propria
IA-1 Tumor limited to 1 tube, with extension into the lamina propria but no extension into the muscularis
IA-2 Tumor limited to 1 tube, with extension into the muscularis
IB Tumor limited to both tubes, without penetrating the serosal surface; no ascites
IB-0 Tumor limited to both tubes, with no extension into the lamina propria
IB-1 Tumor limited to both tubes, with extension into the lamina propria but no extension into the muscularis
IB-2 Tumor limited to both tubes, with extension into the muscularis
IC Tumor limited to 1 or both tubes, with extension onto or through the tubal serosa or with malignant cells in ascites or peritoneal washings
IF Tumor limited to 1 or both tubes at the fimbriated ends, without invasion of tubal wall
II Tumor involves 1 or both fallopian tubes, with pelvic extension
IIA Extension or metastasis to the uterus or the ovaries
IIB Extension to other pelvic structures
IIC Pelvic extension, with malignant cells in ascites or peritoneal washings
III Tumor involves 1 or both fallopian tubes, with peritoneal implants outside the pelvis; included are superficial liver implants, retroperitoneal lymph nodes, or inguinal lymph nodes
IIIA Microscopic peritoneal metastasis outside the pelvis; negative lymph nodes
IIIB Macroscopic peritoneal metastasis outside the pelvis ≤2 cm in greatest diameter; negative lymph nodes
IIIC Macroscopic peritoneal metastasis outside the pelvis and >2 cm in diameter or positive retroperitoneal or inguinal lymph nodes
IV Distant metastasis, including liver parenchyma or positive pleural cytology