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Bone metastases can be classified as osteolytic, osteoblastic, or both. Unlike hematologic malignancies which originate in the blood and form non-solid tumors, bone metastases generally arise from epithelial tumors and form a solid mass inside the bone. Primary breast cancer patients are particularly vulnerable to develop bone metastases. [2]
Osteolytic lesion at the bottom of the radius, diagnosed by a darker section that indicates a loss of bone density. An osteolytic lesion (from the Greek words for "bone" (ὀστέον), and "to unbind" (λύειν)) is a softened section of a patient's bone formed as a symptom of specific diseases, including breast cancer and multiple myeloma.
The bones are a very common site of metastatic disease from breast cancer, and bone metastases can cause severe pain, hypercalcemia and pathologic fracture. Radiotherapy is indicated to prevent pathologic fracture; it is also part of postoperative treatment following repair of a pathologic fracture.
Those with bone metastases benefit from regular infusion of the bone-strengthening agents denosumab and the bisphosphonates; infusion every three months reduces the chance of bone pain, fractures, and bone hypercalcemia. [74] Up to 70% of those with ER-positive metastatic breast cancer benefit from additional endocrine therapy.
Bone is a common site of metastasis in cancers such as breast, prostate and lung cancer. [43] In osteolytic bone metastases, tumour cells migrate to the bone and release cytokines such as parathyroid hormone-related protein (PTHrP), IL-8 and PGE2 . [ 44 ]
The tumor in the lung is then called metastatic breast cancer, not lung cancer. Metastasis is a key element in cancer staging systems such as the TNM staging system, where it represents the "M". In overall stage grouping, metastasis places a cancer in Stage IV. The possibilities of curative treatment are greatly reduced, or often entirely ...
Molecular classification of breast cancer from mRNA expression profiles. DNA microarrays have compared normal cells to breast cancer cells and found differences in the expression of hundreds of genes. Although the significance of many of those genetic differences is unknown, independent analyses by different research groups has found that ...
Breast cancer cells (BCC) frequently metastasize to the skeleton, where they lead to tumor-induced osteolysis and subsequent morbidity.Marc Lacroix has investigated the interrelationships between BCC and bone cells (osteoblasts, the bone-building cells, and osteoclasts, the bone-degrading cells).
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