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Calcaneal fatigue fracture in a 30-year-old male runner. Radiographs were normal (not shown). (a) Sagittal T1-weighted and (b) short tau inversion recovery images show a linear hypointensity (arrows) of calcaneal tuberosity within diffuse bone marrow edema, which appears as an ill-defined area of hyperintensity on a fluid sensitive pulse sequence (arrowheads).
