Table 3. Definitions of FIGO Stage IIIa

StageDescriptionIllustration
IIIThe carcinoma involves the lower third of the vagina and/or extends to the pelvic wall and/or causes hydronephrosis or nonfunctioning kidney and/or involves pelvic and/or para-aortic lymph nodes.
IIIACarcinoma involves the lower third of the vagina, with no extension to the pelvic wall.
Stage IIIA cervical cancer; drawing shows a cross-section of the cervix and vagina. Cancer is shown in the cervix and in the full length of the vagina.
IIIBExtension to the pelvic wall and/or hydronephrosis or nonfunctioning kidney (unless known to be due to another cause).
Stage IIIB cervical cancer; drawing shows cancer in the cervix and pelvic wall. Also shown is cancer blocking the right ureter and an enlarged right ureter and right kidney. The uterus, bladder, and vagina are also shown.
IIICInvolvement of pelvic and/or para-aortic lymph nodes (including micrometastases)b, irrespective of tumor size and extent (with r and p notations).c
Stage IIIC cervical cancer; drawing shows stage IIIC1 cancer that has spread from the cervix to lymph nodes in the pelvis and stage IIIC2 cancer that has spread from the cervix to lymph nodes in the abdomen near the aorta.
–IIIC1–Pelvic lymph node metastasis only.
–IIIC2–Para-aortic lymph node metastasis.

FIGO = Fédération Internationale de Gynécologie et d’Obstétrique.

aAdapted from FIGO Committee for Gynecologic Oncology.[3]

bIsolated tumor cells do not change the stage, but their presence should be recorded.

cAdding notation of r (imaging) and p (pathology) to indicate the findings that are used to allocate the case to stage IIIC. For example, if imaging indicates pelvic lymph node metastasis, the stage allocation would be stage IIIC1r; if confirmed by pathological findings, it would be stage IIIC1p. The type of imaging modality or pathology technique used should always be documented. When in doubt, the lower staging should be assigned.

From: Cervical Cancer Treatment (PDQ®)

Cover of PDQ Cancer Information Summaries
PDQ Cancer Information Summaries [Internet].
Bethesda (MD): National Cancer Institute (US); 2002-.

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