Which of the following is a radiological sign that is considered almost pathognomonic for child abuse?

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The presence of a metaphyseal corner fracture is considered almost pathognomonic for child abuse due to the specific mechanism by which these fractures occur. Metaphyseal corner fractures typically result from a violent pulling or shaking motion, often seen in cases of non-accidental trauma. This type of fracture affects the growth plates of the long bones, particularly at the junction of the metaphysis and epiphysis, which is a vulnerable area during abusive situations.

In contrast, while other fractures listed can occur in the context of child abuse, they are not exclusive to it and can result from other causes or accidents. For instance, humeral and pelvic fractures can occur in various situations, including general trauma or accidents in older children, as well as in infants with underlying metabolic bone disease. Frontal bone fractures are also associated with trauma and can occur in contexts unrelated to child abuse. The specificity and characteristics of metaphyseal corner fractures make them a strong indicator of potential abusive mechanisms in pediatric patients.

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