2.

Cervical cancer staging based on International Federation of Gynaecology and Obstetrics (FIGO 2009) guidelines

Stage	Definition
Stage I	The carcinoma is strictly confined to the cervix (extension to the corpus would be disregarded)
IA	Invasive carcinoma which can be diagnosed only by microscopy, with the deepest invasion ≤5 mm and the largest extension ≥7 mm
	IA1: Measured stromal invasion of ≤3.0 mm in depth and extension of ≤7.0 mm
	IA2: Measured stromal invasion of >3.0 mm and ≤5.0 mm with an extension of ≤7.0 mm
IB	Clinically visible lesions limited to the cervix uteri or pre-clinical cancers greater than stage IA
	IB1: Clinically visible lesion ≤4.0 cm in greatest dimension
	IB2: Clinically visible lesion >4.0 cm in greatest dimension
Stage II	Cervical carcinoma invades beyond the uterus, but not to the pelvic wall or to the lower third of the vagina
IIA	Without parametrial invasion
	IIA1: Clinically visible lesion ≤4.0 cm in greatest dimension
	IIA2: Clinically visible lesion >4.0 cm in greatest dimension
IIB	With obvious parametrial invasion
Stage III	The tumor extends to the pelvic wall and/or involves lower third of the vagina and/or causes hydronephrosis or non-functioning kidney
IIIA	Tumor involves lower third of the vagina, with no extension to the pelvic wall
IIIB	Extension to the pelvic wall and/or hydronephrosis or non-functioning kidney
Stage IV	The carcinoma has extended beyond the true pelvis or has involved (biopsy proven) the mucosa of the bladder or rectum. A bullous edema, as such, does not permit a case to be allotted to Stage IV
IVA	Spread to adjacent organs
IVB	Spread to distant organs