Due to the recent increase in the number of cases of suspected sexual assault, a need has arisen for better knowledge and understanding of the genital anatomy in the prepubertal girl. In spite of the fact that abuse involving the rectum has been reported in up to 40% of young girls assaulted,1 little normative data exists on the appearance of the anorectal region. In the single study of perianal findings in nonabused girls, McCann et al2 documented that findings previously reported to be suggestive of sexual abuse, including erythema, smooth areas, skin tags, and anal dilation, commonly occurred in 161 female subjects up to 11 years old.

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