Calcaneal Stress Fracture

Case Report: Patient with pain in ankle shows on MRI T1 & T2 WI hypointense linear area in the calcaneum oriented parallel to curve of posterior calcaneum along with areas of marrow edema- appearing hyperintense on T2/STIR images suggesting probable stress fracture.   Xrays were previously reported as normal.

Learning Points



  • Stress fractures may take up to 7-14 days to appear on conventional radiographs
  • Vertically oriented zone of increased density on lateral radiograph
  • Perpendicular to the trabecular lines
  • Usually oriented parallel to the curve of the posterior calcaneus

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