Prediction of femoral head avascular necrosis following femoral neck fracture: “pin-tract sign” of ^99mTc-HDP pinhole bone scan after metallic fixation

Abstract

To predict ONFH of femoral head followed by neck fracture, many imaging techniques with variable results were known. In this study, cold defect in early postoperative pinhole bone scans could predict ONFH, and loss of increased uptake along screw inserted site could be a strong indicative sign of ONFH. Further evaluation with a larger population is necessary.