Soft tissue tumors

In this chapter a pragmatic or analytical approach is presented for the detection, staging, grading, and tissue-specific diagnosis of soft tissue tumors (STTs). Some of the most important STTs and their imaging features will be presented, as well as less common STTs that can be diagnosed based on specific imaging features. STTs, which are categorized into 11 histologic groups by the 2020 World Health Organization (WHO) classification of soft tissue and bone tumors, will be reviewed one by one: (1) adipocytic tumors, (2) fibroblastic/myofibroblastic tumors, (3) so-called fibrohistiocytic tumors, (4) smooth muscle tumors, (5) pericytic (perivascular) tumors, (6) skeletal muscle tumors, (7) vascular tumors, (8) gastrointestinal stromal tumors, (9) nerve sheath tumors, (10) chondro-osseous tumors, and (11) tumors of uncertain differentiation. The indications for imaging and the specific magnetic resonance imaging (MRI) findings will be emphasized.In this chapter a pragmatic or analytical approach is presented for the detection, staging, grading, and tissue-specific diagnosis of soft tissue tumors (STTs). Some of the most important STTs and their imaging features will be presented, as well as less common STTs that can be diagnosed based on specific imaging features. STTs, which are categorized into 11 histologic groups by the 2020 World Health Organization (WHO) classification of soft tissue and bone tumors, will be reviewed one by one: (1) adipocytic tumors, (2) fibroblastic/myofibroblastic tumors, (3) so-called fibrohistiocytic tumors, (4) smooth muscle tumors, (5) pericytic (perivascular) tumors, (6) skeletal muscle tumors, (7) vascular tumors, (8) gastrointestinal stromal tumors, (9) nerve sheath tumors, (10) chondro-osseous tumors, and (11) tumors of uncertain differentiation. The indications for imaging and the specific magnetic resonance imaging (MRI) findings will be emphasized.B