This chapter discusses four significant items: (1) incidences of abnormal colposcopy in healthy women, (2) comparison of its abnormality with histology and (3) cytology, and (4) colposcopic findings focused on the lesions in cervical canal to prevent misdiagnosis. 1. The incidence of atypical colposcopic findings (ACF) was 3.6%, whereas that of abnormal cytology (≧ASC-US: Atypical Squamous Cells with Undetermined Significance) was 1.1%. The former is more frequent than the latter. 2. The

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... ce of unsatisfactory colposcopic findings (UCF) was high (24.2%). Pap smear is more useful in primary screening, if performed satisfactorily. 3. Colposcopy detects squamous intraepithelial lesions (SILs) constantly regardless of the severity of lesions. In cytology, it is easier to miss the lower lesions. 4. The incidence of benign reparatory lesion was 61.4% among women (n = 1317) who had either abnormal cytology or colposcopy and was 74.6% if cytology is negative. We should realize that colposcopic abnormality does not always show neoplastic lesions. 5. Main colposcopic abnormalities were the triad of mosaic, punctation, and aceto-white epithelium, which appeared admixed in the majority of cases with tendency of lesion severity. However, colposcopic abnormal findings in benign lesions are also the triad, although the admixed ones are few. 6. The abnormal areas were wider in order of severity of SILs.