Cervical erosion divided into several? What difference?

We often heard the doctor said that the patient is mild cervical erosion or severe cervical erosion, which is under doctor cervical erosion area the size, while cervical erosion divided into mild, moderate and severe. The specific breakdown is as follows : Mild : Erosion is the whole area of cervical area of less than 1 / 3. Moderate : Erosion is the whole area of the cervical area of 1 / 3 to 2 / 3. Severe : Erosion is the whole area of the cervical area of 2 / 3 of the above. Because cervical erosion and the incidence of cervical cancer is certainly one of them, except to check erosion area to observe the size, type, hardness and shape the cervix, the more important it is for cytology, cytological examination to identify cervical cancer early, when necessary, in colposcopy, admission 1:00 cervical tissue for pathological examination, the more comprehensive help both the differential diagnosis.