Assessing osteonecrosis of the femoral head after internal fixation of femoral neck fractures in young patients with fixation implants in situ: the value of MARS MRI in relation to conventional radiography and patient-reported outcomes.

Information from a pathological MRI was not useful, as a majority remained free from symptoms and ONFH signs on radiographs. Furthermore, PROs did not correlate with imaging results. MARS MRI findings must be better understood before being taken into clinical practice. However, a normal MARS MRI seems to be a good prognostic finding.