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Bone metastasis, or osseous metastatic disease, is a category of cancer metastases that result from primary tumor invasions into bones. Bone-originating primary tumors such as osteosarcoma, chondrosarcoma, and Ewing sarcoma are rare; the most common bone tumor is a metastasis. [1] Bone metastases can be classified as osteolytic, osteoblastic ...
A bone tumor is an abnormal growth of tissue in bone, traditionally classified as noncancerous (benign) or cancerous (malignant). [1] [4] Cancerous bone tumors usually originate from a cancer in another part of the body such as from lung, breast, thyroid, kidney and prostate. [1] There may be a lump, pain, or neurological signs from pressure. [1]
Metastasis of tumors involving the limb bones is very common, usually to the lungs. The tumor causes a great deal of pain, and can even lead to fracture of the affected bone. As with human osteosarcoma, bone biopsy is the definitive method to reach a final diagnosis.
Denosumab, sold under the brand names Prolia among others, is a human monoclonal antibody used for the treatment of osteoporosis, treatment-induced bone loss, metastases to bone, and giant cell tumor of bone. [11] [12] The most common side effects are joint and muscle pain in the arms or legs. [13]
The most common location for metastases is the lung, with some cases also involving secondary bone sites, soft tissue, skin, or the liver. [1] [5] The prevalence of metastatic chondroblastoma, however, is quite low and is believed to be less than 0.5%. There is no relationship established between metastasis and previous surgery, non-surgical ...
Osteitis fibrosa cystica (/ ˌ ɒ s t i ˈ aɪ t ɪ s f aɪ ˈ b r oʊ s ə ˈ s ɪ s t ɪ k ə / OSS-tee-EYE-tis fy-BROH-sə SIS-tik-ə) is a skeletal disorder resulting in a loss of bone mass, a weakening of the bones as their calcified supporting structures are replaced with fibrous tissue (peritrabecular fibrosis), and the formation of cyst-like brown tumors in and around the bone.
Tumor bone metastasis releases local cytokines including IL-6, IL-8, IL-11, interleukin-1 beta, TNF alpha and macrophage inflammatory protein. These cytokines activate osteoclasts and inhibit osteoblasts (the cell type responsible for laying down new bone) via the rank ligand pathway leading to bone resorption and calcium release into the ...
High magnification micrograph of giant cells in a giant-cell tumor of bone, H&E stain. The diagnosis of giant-cell tumors is based on biopsy findings. The key histomorphologic feature is, as the name of the entity suggests, (multinucleated) giant cells with up to a hundred nuclei that have prominent nucleoli.
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