Divisione di Pediatria, Presidio Ospedaliero di Cittadella, Padova, Italia.
A case of hematocolpos due to imperforate hymen in a 13-year-old girl has been studied by means of ultrasounds. The images speak clearly. The primary amenorrhoea combined with abdominal colics should always suggest to the surgeon and the specialist in paediatrics the possible existence of a genital malformation.