Cervical Cancer Staging 

Updated: Nov 13, 2015
  • Author: Cecelia H Boardman, MD; Chief Editor: from Memorial Sloan-Kettering - Yukio Sonoda, MD  more...
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TNM and FIGO Classifications for Cervical Cancer

The American Joint Committee on Cancer (AJCC) TNM classification and the International Federation of Gynecology and Obstetrics (FIGO) staging system for cervical cancer are provided below. [1, 2, 3]

Table. TNM and FIGO Classifications for Cervical Cancer (Open Table in a new window)

Primary tumor (T)
TNM FIGO Surgical-Pathologic Findings
Categories Stages  
TX   Primary tumor cannot be assessed
T0   No evidence of primary tumor
Tis   Carcinoma in situ (preinvasive carcinoma)
T1 I Cervical carcinoma confined to the cervix (disregard extension to the corpus)
T1a IA Invasive carcinoma diagnosed only by microscopy; stromal invasion with a maximum depth of 5.0 mm measured from the base of the epithelium and a horizontal spread of 7.0 mm or less; vascular space involvement, venous or lymphatic, does not affect classification
T1a1 IA1 Measured stromal invasion ≤ 3.0 mm in depth and ≤ 7.0 mm in horizontal spread
T1a2 IA2 Measured stromal invasion > 3.0 mm and ≤ 5.0 mm with a horizontal spread ≤ 7.0 mm
T1b IB Clinically visible lesion confined to the cervix or microscopic lesion greater than T1a/IA2
T1b1 IB1 Clinically visible lesion ≤ 4.0 cm in greatest dimension
T1b2 IB2 Clinically visible lesion > 4.0 cm in greatest dimension
T2 II Cervical carcinoma invades beyond uterus but not to pelvic wall or to lower third of vagina
T2a IIA Tumor without parametrial invasion
T2a1 IIA1 Clinically visible lesion ≤ 4.0 cm in greatest dimension
T2a2 IIA2 Clinically visible lesion > 4.0 cm in greatest dimension
T2b IIB Tumor with parametrial invasion
T3 III Tumor extends to pelvic wall and/or involves lower third of vagina and/or causes hydronephrosis or nonfunctional kidney
T3a IIIA Tumor involves lower third of vagina, no extension to pelvic wall
T3b IIIB Tumor extends to pelvic wall and/or causes hydronephrosis or nonfunctional kidney
T4 IV Tumor invades mucosa of bladder or rectum and/or extends beyond true pelvis (bullous edema is not sufficient to classify a tumor as T4)
T4a IVA Tumor invades mucosa of bladder or rectum (bullous edema is not sufficient to classify a tumor as T4)
T4b IVB Tumor extends beyond true pelvis
Regional lymph nodes (N)
NX Regional lymph nodes cannot be assessed
N0 No regional lymph node metastasis
N1 Regional lymph node metastasis
Distant metastasis (M)
M0 No distant metastasis
M1 Distant metastasis (including peritoneal spread; involvement of supraclavicular, mediastinal, or para-aortic lymph nodes; and lung, liver, or bone)