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Individuals with a de novo diagnosis of this tumor may have had an ALT/WDL that progressed to a dedifferentiated liposarcoma but went undetected because it developed asymptomatically in a highly sequestered site such as the retroperitoneum or abdominal cavity. Many of the dedifferentiated liposarcoma tumors' clinical and genetic features are ...
A lipoma is a benign tumor made of fat tissue. [1] They are generally soft to the touch, movable, and painless. [ 1 ] They usually occur just under the skin, but occasionally may be deeper. [ 1 ]
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.
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.
For example, a lipoma is a common benign tumor of fat cells , and a chondroma is a benign tumor of cartilage-forming cells (chondrocytes). Adenomas are benign tumors of gland-forming cells, and are usually specified further by their cell or organ of origin, as in hepatic adenoma (a benign tumor of hepatocytes, or liver cells).
Spindle cell lipoma is most frequently located in the upper back, shoulder, or posterior neck subcutaneous layer. [3] Nonetheless, reports of it occurring in the mediastinum, hypopharynx, larynx, anterior neck, suprasellar region, esophagus, nasal vestibule, tongue, floor of mouth, vallecula, parotid gland, and breast have been made. [4]
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