<unk> s are typically divided into two major groups: bone<unk> s and soft-tissue<unk> s, each of which has multiple subtypes. In the United States, the American Joint Committee on Cancer (AJCC) publishes guidelines that classify the subtypes of<unk> . These subtypes are as follows: Subtypes of bone<unk>  * Osteosarcoma * Chondrosarcoma * Poorly differentiated round/spindle cell tumors (includes Ewing<unk>  * Hemangioendothelioma * Angiosarcoma * Fibrosarcoma/myofibrosarcoma * Chordoma * Adamantinoma * Other: * Liposarcoma * Leiomyosarcoma * Malignant peripheral nerve sheath tumor * Rhabdomyosarcoma * Synovial<unk>  * Malignant solitary fibrous tumor. Subtypes of soft tissue<unk>  * Liposarcoma (includes the following varieties: atypical lipomatous tumor/well-differentiated liposarcoma, dedifferentiated liposarcoma, myxoid<unk> , pleomorphic liposarcoma, and myxoid pleomorphic liposarcoma * Atypical lipomatous tumor * Dermatofibrosarcoma protuberans (includes pigmented varieties) * Dermatofibrosarcoma protuberans, fibrosarcomatous * Giant cell fibroblastoma * Malignant solitary fibrous tumor * Inflammatory myofibroblastic tumor * Low-grade myofibroblastic<unk>  * Fibrosarcoma (includes adult and sclerosing epithelioid varieties) * Myxofibrosarcoma (formerly myxoid malignant fibrous histiocytoma) * Low-grade fibromyxoid<unk>  * Giant cell tumor of soft tissues * Leiomyosarcoma * Malignant glomus tumor * Rhabdomyosarcoma (includes the following varieties: embryonal, alveolar, pleomorphic, and spindle cell/sclerosing) * Hemangioendothelioma (includes the following varieties: retiform, pseudomyogenic, and epithelioid) * Angiosarcoma of soft tissue * Extraskeletal osteosarcoma * Gastrointestinal stromal tumor, malignant (GIST) * Malignant peripheral nerve sheath tumor (includes epithelioid variety) * Malignant Triton tumor * Malignant granular cell tumor * Malignant ossifying fibromyxoid tumor * Stromal<unk>  not otherwise specified * Myoepithelial carcinoma * Malignant phosphaturic mesenchymal tumor * Synovial<unk>  (includes the following varieties: spindle cell, biphasic, and not otherwise specified) * Epithelioid<unk>  * Alveolar soft part<unk>  * Clear cell<unk>  of soft tissue * Extraskeletal myxoid chondrosarcoma * Extraskeletal Ewing<unk>  * Desmoplastic small round cell tumor * Extrarenal rhabdoid tumor * Perivascular epithelioid cell tumor, not otherwise specified * Intimal<unk>  * Undifferentiated spindle cell<unk>  * Undifferentiated pleomorphic<unk>  * Undifferentiated round cell<unk>  * Undifferentiated epithelioid<unk>  * Undifferentiated<unk> , not otherwise specified.
Sarcoma
Angiosarcoma
Soft-tissue sarcoma
Hemangiosarcoma
Xanthoma
Myosarcoma
Epithelioma
Liposarcoma