Fig. 3

Preoperative imaging studies. A T1WI, the bone marrow cavity of the left femoris was dilated and irregular in shape, with multiple irregular patchy and nodular hyposignal foci (straight arrow). B, D The coronal, sagittal, and cross-sectional views of the STIR show the appearance of the lesion. T1WI shows the lesion with low-signal intensity. Inhomogeneous high signal, unclear boundary and adjacent cortical destruction in STIR ( straight arrow), surrounding soft tissue swelling, and exudation (curved arrow)