Treatment Patterns and Survival among Adult Patients with Advanced Soft Tissue Sarcoma: A Retrospective Medical Record Review in the United Kingdom, Spain, Germany, and France

Table 1

Histologic categories.

Histologic category used in analysis	Histologic subtypes reported in the medical record	Corresponding WHO histologic category and subtypes^a
Leiomyosarcoma	Smooth-muscle tumor and uterine leiomyosarcoma	Smooth-muscle tumor (i.e., leiomyosarcoma and leiomyoma of deep soft tissue)
Fibroblastic/myofibroblastic sarcoma	Fibroblastic/myofibroblastic sarcoma	Fibroblastic/myofibroblastic sarcoma (i.e., fibrosarcoma, myxofibrosarcoma, low-grade fibromyxoid sarcoma, and sclerosing epithelioid fibrosarcoma)
Liposarcoma	Adipocytic tumor	Adipocytic tumor (i.e., dedifferentiated liposarcoma, myxoid liposarcoma, and pleomorphic liposarcoma)
Vascular sarcoma	Vascular tumor of soft tissue and angiosarcoma	Vascular tumor (epithelioid hemangioendothelioma and angiosarcoma of soft tissue)
Rhabdomyosarcoma	Skeletal-muscle tumor	Skeletal-muscle tumor (i.e., rhabdomyosarcoma, including embryonal, alveolar, and pleomorphic forms, and spindle cell/sclerosing rhabdomyosarcoma)
Synovial sarcoma	Synovial sarcoma	Tumor of uncertain differentiation: synovial sarcoma
Others or not otherwise specified (NOS)	Chondro-osseous tumor, fibrohistiocytic tumor, pericytic tumor, nerve sheath tumor, tumor of uncertain differentiation, and undifferentiated/unclassified sarcoma	Not applicable; So-called fibrohistiocytic tumor; Perivascular tumor; Chondro-osseous tumor; Nerve sheath tumor; Tumor of uncertain differentiation (unless otherwise noted^b); Undifferentiated/unclassified tumor

WHO: World Health Organization; ^aaccording to the WHO classification of tumours of soft tissue and bone [8]; ^bsynovial sarcoma, classified under “Tumours of uncertain differentiation,” was included in a separate histologic category for the analyses.