Prevalence of high-grade cervical intraepithelial neoplasia (CIN) in the patients with atypical squamous cells of undetermined significance (ASC-US) pap smears: hospital based, dynamic population area.

OBJECTIVE To determine the prevalence of cervical intraepithelial neoplasia (CIN) 2-3 (high-grade CIN) among women with Atypical Squamous Cells of Undetermined Significance (ASC-US) Pap smear. MATERIAL AND METHOD A retrospective medical record review of220 women with ASC-US cervical Pap smear, including age, menstruation status, parity, placed of residence, occupation, main complaint, and definite histopathological result between July 2007 and January 2010 was done. RESULTS The prevalence of high-grade CIN2 and CIN 3 in Thammasat University Hospital were 8.6% and 3.2% respectively No cancer was found in the present study. There was no statistically significant difference in the prevalence of high-grade CIN between the patients who were 50 years old or more and those who were younger. CONCLUSION Prevalence of high-grade CIN in women with ASC-US was 11.8%. Immediate colposcopy is recommended in women with ASC-US