Colposcopy has become an important link and tool in the prevention and treatment of cervical cancer. The quality and pathological assessment of colposcopy is a key point in follow-up and treatment.The main purpose of this study was to analyze the correlation between colposcopy indications and pathological findings.

1. inclusion/exclusion criteria inclusion：(1) at least 18 years of age; (2) Complete colposcopy report; (3) Clear pathological diagnosis was reported after colposcopic biopsy.

   exclusion：Not all of the above criteria are met

2. study purpose Main purpose

1）analyze the correlation between colposcopy indications and pathological findings Secondary purpose

1. Influence of colposcopic transformation area type on pathological evaluation
2. Colposcopic follow-up results
3. The differences and causes of colposcopic biopsy pathology and histology
4. Quality of colposcopy in our hospital （3）Retrospective study Data of out-patient population in our hospital from 2005 were included

Inclusion Criteria:

1. at least 18 years of age;
2. Complete colposcopy report;
3. Clear pathological diagnosis was reported after colposcopic biopsy.

Exclusion Criteria:

1. Under 18 years of age;
2. Lack of colposcopic reports;
3. Lack of cervical biopsy pathology results;
4. Other conditions deemed inappropriate by the investigator to participate in this study.

The outpatient population of our hospital since 2005 10,000 cases are expected to be included.