Table I.

Features of MRI of early cervical cancer in different stages.

Grouping	Features
Stage Ia	No evidence of mass lesion.
Stage Ib	Tumor pierced cervical low signal intensity ring.
Stage IIa	The tumor pierced the upper vagina but did not touch the parametrium.
Stage IIb	The matrix of the cervix was destroyed and the parametrium tissues were invaded.

MRI, magnetic resonance imaging.