Toddler's fractures or childhood accidental spiral tibial (CAST) fractures are bone fractures of the distal (lower) part of the shin bone (tibia) in toddlers (aged 9 months-3 years) and other young children (less than 8 years).[1] The fracture is found in the distal two thirds of the tibia in 95% of cases,[1] is undisplaced and has a spiral pattern. It occurs after low-energy trauma, sometimes with a rotational component.