Hydrocolpos is characterised by an expanded fluid-filled vaginal cavity. When it is associated with distention of the uterine cavity, the term hydrometrocolpos should then be used. It may present in neonate, infancy or in an adolescent girl with a lower abdominal mass, or be delayed till menarchy 3.
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Pathology
Aetiology
imperforate hymen (most common)
vaginal stenosis or transverse vaginal septum
Associations
Radiographic features
Ultrasound
The fluid-filled distended vaginal canal may be seen as an anechoic mass between the bladder and the rectum
Differential diagnosis
Consider:
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