Keywords: Adult Fibrosarcoma; Angiosarcomas; Dermatofibrosarcoma Protuberans; Fibroblastic Myxoinflammatory Tumor; Haemangioendothelioma; Infantile Fibrosarcoma; Inflammatory Myofibroblastic Tumor; Intimal Sarcoma; Kaposi Sarcoma; Low Grade Fibromyxoid Sarcoma; Myxofibrosarcoma; Rare Sarcomas; Sarcomas; Sclerosing Epithelioid Fibrosarcoma; Solitary Fibrous Tumor; Uncommon Sarcomas.