Clear Cell Chondrosarcoma in Italy

Inclusion Criteria: * Male and female patients with diagnosis of clear cell chondrosarcoma and chondrosarcoma with a clear cell component treated from 01 Jan 1982 to 31 Dec 2023 * Information available (date of primary tumor diagnosis, local treatments, systemic treatment, response to systemic treatment, date of progression) and date and status at last follow-up * Imaging studies available for revision * Histological slides available for revision Exclusion Criteria: * \- Diagnosis different from clear cell chondrosarcoma or chondrosarcoma with a clear cell component; * Absence of radiological and/or clinical data