Sacral butterfly vertebrae in the setting of a sacral fracture and unstable pelvic ring injury: A case report and review of the literature

Abstract

Butterfly vertebrae are rare developmental anomalies representing failure of formation of the vertebral body. There have only been 8 previous reports of a butterfly vertebra occurring at S1. This is the first described case of a butterfly vertebra presenting with a sacral fracture and pelvic ring injury.