9th AJCC cervical cancer staging

T category FIGO stage T criteria 
TX  Primary tumor cannot be assessed 
T0  No evidence of primary tumor 
T1 I Carcinoma is strictly confined to cervix (extension to corpus should be disregarded) 
T1a IA Invasive carcinoma that can be diagnosed by microscopy with maximum depth of invasion ≤5 mm 
T1a1 IA1 Measured stromal invasion ≤3 mm 
T1a2 IA2 Measured stromal invasion >3 mm and ≤5 mm 
T1b IB Invasive carcinoma with measured deepest invasion >5 mm; lesion limited to cervix uteri with size measured by maximum tumor diameter. Involvement of vascular/lymphatic space should not change stage; lateral extent of lesion no longer considered 
T1b1 IB1 Invasive carcinoma >5 mm in depth of stromal invasion and ≤2 cm in greatest dimension 
T1b2 IB2 Invasive carcinoma >2 cm and ≤4 cm in greatest dimension 
T1b3 IB3 Invasive carcinoma >4 cm in greatest dimension 
T2 II Carcinoma invades beyond the uterus but has not extended onto the lower one-third of vagina or to the pelvic wall 
T2a IIA Involvement limited to upper two-thirds of vagina without parametrial invasion  
T2a1 IIA1 Invasive carcinoma ≤4 cm in greatest dimension 
T2a2 IIA2 Invasive carcinoma >4 cm in greatest dimension 
T2b IIB With parametrial invasion but not up to the pelvic wall 
T3 III Carcinoma involves lower one-third of vagina and or extends to the pelvic wall and or causes hydronephrosis or non-functioning kidney. Pelvic wall is defined as muscle fascia, neurovascular structures and skeletal portions of bony pelvis; cases with no cancer-free space between tumor and pelvic wall by rectal examination 
T3a IIIA Involves lower one-third of vagina with no extension to pelvic wall 
T3b IIIB Extension to pelvic wall and/or hydronephrosis or non-functioning kidney  
T4 IVA Biopsy proven cancer has involved mucosa of bladder or rectum or spread to adjacent organs  
N category FIGO stage N criteria 
NX  Regional lymph nodes cannot be assessed 
N0  No regional lymph node metastasis  
N0(i+)  Isolated tumor cells in regional lymph node(s) ≤0.2 mm or single cells or clusters of cells ≤200 cells in a single lymph node cross-section 
N1 IIIC1 Regional lymph node metastasis to pelvic lymph nodes only 
N1mi IIIC1 Regional lymph node metastasis (>0.2 mm but ≤2 mm in greatest dimension) to pelvic lymph nodes 
N1a IIIC1 Regional lymph node metastasis (>2 mm in greatest dimension) to pelvic lymph nodes 
N2 IIIC2 Regional lymph node metastasis to para-aortic lymph nodes, with or without positive pelvic lymph nodes 
N2mi IIIC2 Regional lymph node metastasis (>0.2 mm but ≤2 mm in greatest dimension) to para-aortic lymph nodes, with or without positive pelvic lymph nodes 
N2a IIIC2 Regional lymph node metastasis (>2 mm in greatest dimension) to para-aortic lymph nodes, with or without positive pelvic lymph nodes 
M category FIGO stage M criteria 
M0  No distant metastasis 
cM1 IVB Distant metastasis (includes metastasis to inguinal lymph nodes, intraperitoneal disease, lung, liver, or bone; excludes metastasis to pelvic or para-aortic lymph nodes or vagina) 
pM1 IVB Microscopic confirmation of distant metastasis (includes metastasis to inguinal lymph nodes, intraperitoneal disease, lung, liver, or bone; excludes metastasis to pelvic or para-aortic lymph nodes or vagina) 
T N M Stage 
T1 N0 M0 I 
T1a N0 M0 IA 
T1a1 N0 M0 IA1 
T1a2 N0 M0 IA2 
T1b N0 M0 IB 
T1b1 N0 M0 IB1 
T1b2 N0 M0 IB2 
T1b3 N0 M0 IB3 
T2 N0 M0 II 
T2a N0 M0 IIA 
T2a1 N0 M0 IIA1 
T2a2 N0 M0 IIA2 
T2b N0 M0 IIB 
T3 N0 M0 III 
T3a N0 M0 IIIA 
T3b N0 M0 IIIB 
TX, T0, T1-T3 N1 M0 IIIC1 
TX, T0, T1-T3 N2 M0 IIIC2 
T4 Any N  M0 IVA 
Any T Any N M1 IVB