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A practical manual on visual screening for cervical neoplasia
Appendix 1 / FIGO staging of Cervical carcinomas
Stage I |
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Stage I is carcinoma strictly confined to the cervix; extension to the uterine corpus should be disregarded. The diagnosis of both Stages IA1 and IA2 should be based on microscopic examination of removed tissue, preferably a cone, which must include the entire lesion.
- Stage IA: Invasive cancer identified only microscopically. Invasion is limited to measured stromal invasion with a maximum depth of 5 mm and no wider than 7 mm.
- Stage IA1: Stage IA1: Measured invasion of the stroma no greater than 3 mm in depth and no wider than 7 mm diameter.
- Stage IA2: Stage IA2: Measured invasion of stroma greater than 3 mm but no greater than 5 mm in depth and no wider than 7 mm in diameter.
- Stage IB: Stage IB: Clinical lesions confined to the cervix or preclinical lesions greater than Stage IA. All gross lesions even with superficial invasion are Stage IB cancers.
- Stage IB1: Stage IB1: Clinical lesions no greater than 4 cm in size.
- Stage IB2: Stage IB2: Clinical lesions greater than 4 cm in size.
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Stage II |
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Stage II is carcinoma that extends beyond the cervix, but does not extend into the pelvic wall. The carcinoma involves the vagina, but not as far as the lower third.
- Stage IIA: No obvious parametrial involvement. Involvement of up to the upper two-thirds of the vagina.
- Stage IAB: Obvious parametrial involvement, but not into the pelvic sidewall.
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Stage III |
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Stage III is carcinoma that has extended into the pelvic sidewall. On rectal examination, there is no cancer-free space between the tumour and the pelvic sidewall. The tumour involves the lower third of the vagina. All cases with hydronephrosis or a non-functioning kidney are Stage III cancers.
- Stage IIIA: No extension into the pelvic sidewall but involvement of the lower third of the vagina.
- Stage IIIB: Extension into the pelvic sidewall or hydronephrosis or non-functioning kidney.
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Stage IV |
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Stage IV is carcinoma that has extended beyond the true pelvis or has clinically involved the mucosa of the bladder and/or rectum.
- Stage IVA: Spread of the tumour into adjacent pelvic organs.
- Stage IVB: Spread to distant organs.
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Source: TNM Classification of malignant tumours. L. Sobin and Ch Wittekind (eds.),
UICC Internation Union against Cancer, Geneva, Switzerland.
pp155-157; 6th ed. 2002