Soft-tissue sarcoma | |
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Undifferentiated soft tissue sarcoma in left lung of young child | |
Specialty | Oncology |
A soft-tissue sarcoma (STS) is a malignant tumor, a type of cancer, that develops in soft tissue.[1] A soft-tissue sarcoma is often a painless mass that grows slowly over months or years. They may be superficial or deep-seated. Any such unexplained mass must be diagnosed by biopsy.[2] Treatment may include surgery, radiotherapy, chemotherapy, and targeted drug therapy.[3] Bone sarcomas are the other class of sarcomas.
There are many different types, many of which are rarely found.[4] The World Health Organization lists more than fifty subtypes.[2]