Fig. 6

Metastatic tumor of the distal femur of renal cell carcinoma, male, 53 years old. ① Preoperative MRI T2WI (coronal) showed that the left distal femur showed a mass-like long T2 signal, indicating a tumor signal. ②–③ After 2 and 6 months of curettage and cement fixation of the tumor, the X-ray films (positive and lateral position) showed that the cement-host bone healed completely. ④ Ten months after the operation, MRI showed that the mass (coronal and sagittal) was slightly longer on T1 and T2 signal intensity, indicating tumor recurrence