Three-phase radionuclide bone imaging in stress injury of the anterior iliac crest.

Two adolescents with stress-related avulsion injury of the anterior iliac crest apophysis are presented. Increased tracer concentration in the anterior iliac crest area is present on the blood-pool and delayed images. Increased iliac crest activity was demonstrated on the radionuclide angiogram in one patient. Scintigraphic detection of this injury is useful when clinical findings are atypical, if objective evidence of a fracture is required, or when the fracture is not readily apparent radiographically.