A 46-year-old female breast cancer patient reeived FDG PET/CT scan for preoperative survey. In addition to the hypermetabolism in the known left breast cancerous lesion, there was also a moderate hypermetabolic spot in the T3-level spinal canal. She denied neither upper back pain nor any neurological deficits. Following MRI showed a 2cm intradural extramedullary homogenous enhancing nodule in T3-level spinal canal, deviating thoracic cord to the right. She received laminectomy for surgical removal and tissue proof of the spinal canal lesion, with athology reveling schwannoma.