Bony metastases following complete resection of periosteal chondrosarcoma

Periosteal chondrosarcoma (PC) is a rare low-grade malignant cartilaginous tumor originating on the bone surface. Wide surgical resection is the recommended treatment. Prognosis is usually good if surgery is adequate. Metastasis is late and very rare. We present the clinical, radiographic, and pathological features of a PC accompanied with fibular cortical invasion in a 30-year-old woman. Wide resection was performed at presentation, but a whole-body positron emission tomography/computed tomography (PET/CT) examination 10 months after operation showed multiple bone metastases (MBM) especially in the spine, pelvis, bilateral femurs, and humeri without local recurrence. To the best of our knowledge, the present report is the first concerning a PC with so extensive postoperative MBM but without local recurrence.