Background: U-shaped sacral fractures or Jumper’s fractures are rare injuries in adults and are even rarer in the pediatric population. These fractures share a common pathoanatomy where the pelvis as a unit together with the bilateral alar parts and the lower part of the sacrum, loses its skeletal and soft tissue connections to the remaining axial skeleton and hence the term spinopelvic dissociation. This report describes an unusual pattern of spinopelvic dissociation in a young child where the transverse process of the fifth lumbar vertebra was avulsed on one side (spinal side avulsion), whereas on the other side, complete iliac crest apophyseal avulsion took place (pelvic sided avulsion). To our knowledge, this combination of injuries was not reported before. The available literature describing pediatric U-shaped sacral fractures were also reviewed to help explain the pathoanatomic basis of this association