What is stage IA of cervical cancer?

Stage IA of cervical cancer is defined as follows in the FIGO staging system:

* Invasive carcinoma confined to the cervix (extension to the corpus should be disregarded)

* No obvious clinical involvement of parametria, the lower third of the vagina, or pelvic side wall

* No obvious lymph node metastasis outside the cervix or paracervical region

* No distant metastasis