Haematocolpos is a term given to a blood-filled dilated vagina due to menstrual blood in the setting of an anatomical obstruction, usually an imperforate hymen. In this condition, there is no distention of the uterine cavity, c.f. haematometrocolpos.
Patients may present with amenorrhoea or vague abdominal pain.
Typically shows a fluid distended hypoechogenic mass along the extent of the vagina but not involving the uterus.
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