Fig 1. Case 1. A 57-year-old woman with metastatic brain tumor located inside the left-sided M1.

A-1, Preoperative MR imaging displays heterogeneously enhancing tumor in the M1.

A-2, Postoperative MR imaging shows ring enhancing lesion, but there was no residual tumor in the M1 according to the intraoperative observation for tumor cavity.

B, fMRI images activated by right hand clenching (B, orange) and right elbow flexion (B, blue) before surgery.

C, fMRI images activated by right hand clenching (orange) and right elbow flexion (blue) after surgery. A relatively small area of the contralateral M1 was activated by right hand clenching before surgery, whereas a large area of the contralateral M1 was activated by right hand clenching after surgery.