Figure 2.

Nomogram predicting the likelihood of a parametrial involvement in patients with early stage cervical cancer. The probability of a parametrial involvement is calculated by drawing a line to the corresponding point on the axis for each of the following variables: tumor size; sentinel lymph node; deep stromal invasion; lympho-vascular space invasion. The points accumulated by the covariates are summed up and correspond to the “total points”. Next, a vertical line is projected from the total points line to the predicted probability bottom scale to obtain the individual probability of a parametrial invasion.