Final answer:
When a PN assesses a school-age child about a new arm fracture and finds a discrepancy in the child's explanation compared to the mother's, it suggests potential child abuse or neglect. The PN should report this concern to the appropriate authorities.
Step-by-step explanation:
In this scenario, when a PN assesses a school-age child about a new arm fracture and discovers that the child's explanation for the injury differs from the one provided by the mother, it suggests potential child abuse or neglect. The discrepancy in the accounts raises concerns about the child's safety and the possibility of non-accidental trauma. The PN should follow the appropriate protocols to report the situation to the appropriate authorities, such as child protective services.