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A sarcoma is a malignant tumor, a type of cancer that arises from cells of mesenchymal (connective tissue) origin. [1] [2] Connective tissue is a broad term that includes bone, cartilage, muscle, fat, vascular, or other structural tissues, and sarcomas can arise in any of these types of tissues.
Ewing sarcoma is a type of pediatric cancer [5] that forms in bone or soft tissue. [1] Symptoms may include swelling and pain at the site of the tumor, fever , and a bone fracture . [ 2 ] The most common areas where it begins are the legs, pelvis , and chest wall. [ 4 ]
It is a sarcoma arising from the lining of blood vessels; that is, blood-filled channels and spaces are commonly observed microscopically. A frequent cause of death is the rupturing of this tumor, causing the patient to rapidly bleed to death. The term "angiosarcoma", when used without a modifier, usually refers to hemangiosarcoma. [2]
Kaposi's sarcoma (KS) is a type of cancer that can form masses on the skin, in lymph nodes, in the mouth, or in other organs. [ 4 ] [ 6 ] The skin lesions are usually painless, purple and may be flat or raised.
Spindle cell sarcoma is a type of connective tissue cancer. The tumors generally begin in layers of connective tissue , as found under the skin, between muscles, and surrounding organs, and will generally start as a small, inflamed lump, which grows in size.
It was when he was moved to a cell on death row that Hideko noticed a shift in his demeanour. One prison visit in particular stands out. "He told me, 'there was an execution yesterday - it was a ...
These less surgically assessible tumors tend to recur repeatedly and ultimately may cause death due to their injurious effects on vital organs. While ALT/WDL tumors have very little potential to metastasize , about 10% will convert to an overtly malignant and potentially metastasizing liposarcoma form, dedifferentiated liposarcoma.
Kaposi sarcoma often occurs in patients with acquired immune deficiency syndrome. Kaposi sarcoma, however, has different characteristics from typical soft-tissue sarcomas and is treated differently. [8] In a very small fraction of cases, sarcoma may be related to a rare inherited genetic alteration of the TP53 gene and is known as Li-Fraumeni ...