A<unk>  is a malignant (cancerous) tumor that develops in mesenchymal<unk> .  Mesenchymal<unk> s encompass all the muscle, connective<unk> s, and bones of the body.<unk> s can invade surrounding<unk>  and can metastasize (spread) to other organs of the body, forming secondary tumors. The cells of secondary tumors are similar to those of the primary (original) cancer. Secondary tumors are referred to as "metastatic<unk> " because they are part of the same cancer and are not a new disease.  The most common site of spread is to the lungs.
Some tumors of the<unk><unk>  are benign (noncancerous) and are not sarcomas. These tumors do not spread and are rarely life-threatening. However, benign tumors can crowd nearby organs and cause symptoms or interfere with normal body functions.
Soft tissue sarcoma
Sarcoma
Osteoblastoma
Angiosarcoma
Osteosarcoma
Oncocytoma
Liposarcoma
Neuroma