Soft-tissue sarcoma

Soft-tissue sarcoma
Undifferentiated soft tissue sarcoma in left lung of young child
SpecialtyOncology 

A soft-tissue sarcoma (STS) is a malignant tumor, a type of cancer, that develops in soft tissue. 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. Treatment may include surgery, radiotherapy, chemotherapy, and targeted drug therapy. Bone sarcomas are the other class of sarcomas.

There are many different types, many of which are rarely found. The World Health Organization lists more than fifty subtypes.

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