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The radiology literature describing the injuries of child abuse is very extensive. Articles on the distribution of injuries and the way in which a diagnosis was reached are less frequent. This article represents the detailed analysis of a cohort of patients, suspected of being victims of abuse, referred to the authors. It necessarily reflects personal experience and is not a population study. The distribution of the injuries in a cohort of 467 patients is reviewed.

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The notes of 214 children who, over a period of 7 years, had been referred after an allegation or a suspicion of any form of child abuse, were examined retrospectively to establish the pattern of injury found, especially with regard to anal fissures or scars. These were all children who had had their genitalia examined at the time of their referral. In 81 children (Group A) who had no history or evidence of sexual abuse, two fissures were found, both with medical explanations for their presence. In 83 (Group B) who alleged sexual abuse but denied anal abuse, nine (11%) had fissures or scars, and in four of the nine there was a history of significant constipation at some time. In 50 children (Group C) who had a strong history of anal abuse, 41 (84%) had fissures or scars. The diagnosis in 13 of these cases was considered definite because there was a confession or guilty plea from the abuser; in the remainder, the diagnosis was "not proven" despite a strong history or gross anal signs and regardless of the verdict in court proceedings. The significance of the findings was discussed with a view to clarifying the relative importance of anal fissures in children with a strong history of anal abuse.

The development of elastic fibres in the upper urinary tract was studied in 31 fetuses ranging in ovulatory age from 10 to 24 weeks using special staining techniques for elastic fibres. The number, orientation and distribution of elastic fibres are described and correlated with age, ureteric level, and fetal weight. Significantly, before 10 weeks, elastic fibres were few in number, poorly developed, and randomly arranged. After 12 weeks, these fibres became more numerous at each level of the urinary tract, and were seen to develop specific orientation. The findings are described and potential clinical implications are discussed.