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In mixed tumors, giant cells are more likely to be found in higher proportions at the edge of a tumor. [11] When extensive necrosis is present, it is possible for a giant-cell tumor to have only a thin rim of viable cells remaining at the perimeter of the mass. [citation needed]
A giant cell (also known as a multinucleated giant cell, or multinucleate giant cell) is a mass formed by the union of several distinct cells (usually histiocytes), often forming a granuloma. [ 1 ] Although there is typically a focus on the pathological aspects of multinucleate giant cells (MGCs), they also play many important physiological roles.
The giant-cell glioblastoma is a histological variant of glioblastoma, presenting a prevalence of bizarre, multinucleated (more than 20 nuclei) giant (up to 400 μm diameter) cells. It occasionally shows an abundant stromal reticulin network and presents a high frequency of TP53 gene mutations .
The giant cells vary in size and shape with their nuclei often lined-up in wreath-like or lobular formations. [2] The tumors may infiltrate into and through nearby subcutaneous fat tissue, [2] commonly have intralesional hemorrhages and distinctive perivascular onionskin-like lymphocytes, [6] and occasionally contain nodules of smooth muscle ...
Tenosynovial giant cell tumor (TGCT) is a non-malignant tumor defined histologically as inclusions of “osteoclast-like” multinucleated giant cells, hemosiderin, and macrophages. [1] This histology can present one of 2 clinically distinct ways. TGCT tumors often develop from the lining of joints (also known as synovial tissue).
Malignancy in giant-cell tumor is uncommon and occurs in about 2% of all cases. However, if malignant degeneration does occur, it is likely to metastasize to the lungs. Giant-cell tumors are normally benign, [1] with unpredictable behavior. [2] It is a heterogeneous tumor composed of three different cell populations.
Subependymal giant cell astrocytoma (SEGA, SGCA, or SGCT) is a low-grade astrocytic brain tumor (astrocytoma) that arises within the ventricles of the brain. [1] It is most commonly associated with tuberous sclerosis complex (TSC). Although it is a low-grade tumor, its location can potentially obstruct the ventricles and lead to hydrocephalus.
As such, the term lives on in the names of many conditions, even when the size of the cell is no longer one of the most important diagnostic criteria. The phrase giant cell is also frequently used, especially with carcinoma. Giant cell tumors include giant-cell tumor of bone, giant-cell tumor of the tendon sheath, [1] and giant cell ...