Magnetic resonance appearance of bone marrow edema associated with hydroxyapatite deposition disease without cortical erosion.

The authors report the magnetic resonance (MR) appearance of bone marrow edema associated with hydroxyapatite deposition disease without cortical erosion. Hydroxyapatite deposition disease may have bone marrow edema on MR imaging without radiographic evidence of cortical erosion, mimicking the appearance of fracture, neoplasm, or infection. Awareness of this association can prevent unnecessary additional imaging evaluation or biopsy.