Menstrual-like vaginal bleeding in prepubertal girls: an unexplained condition.

Unexplained menstrual-like cyclic vaginal bleeding, lasting for several days and without any uterine and vaginal anomaly, is a rare condition in prepubertal girls. Only small series (containing four to eleven cases) have been described in literature. We report our in nine girls presenting with vaginal bleeding without any abnormality at gynaecological, hormonal and echographic examination.