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Frequency. 15% (50 year olds), 70% (over 80 year olds) [ 7 ] Osteoporosis is a systemic skeletal disorder characterized by low bone mass, micro-architectural deterioration of bone tissue leading to more porous bone, and consequent increase in fracture risk. It is the most common reason for a broken bone among the elderly. [ 3 ]
Chemotherapy (often abbreviated chemo, sometimes CTX and CTx) is the type of cancer treatment that uses one or more anti-cancer drugs (chemotherapeutic agents or alkylating agents) in a standard regimen. Chemotherapy may be given with a curative intent (which almost always involves combinations of drugs), or it may aim only to prolong life or ...
Osteoporosis is caused by bone loss. Most often, the reason for bone loss is very low levels of the hormone estrogen. Estrogen plays an important role in building and maintaining your bones. The ...
A scanner used to measure bone density using dual energy X-ray absorptiometry. Bone density, or bone mineral density, is the amount of bone mineral in bone tissue.The concept is of mass of mineral per volume of bone (relating to density in the physics sense), although clinically it is measured by proxy according to optical density per square centimetre of bone surface upon imaging. [1]
Bisphosphonates are used to treat osteoporosis, osteitis deformans (Paget's disease of the bone), bone metastasis (with or without hypercalcemia), multiple myeloma, and other conditions involving fragile, breakable bone. In osteoporosis and Paget's, the most popular first-line bisphosphonate drugs are alendronate and risedronate.
Osteoblastic synthesis of bone does not increase to compensate for the accelerated bone resorption as the lower estrogen levels result in increased rates of osteoblast apoptosis. [42] The higher rate of bone resorption compared to bone formation leads to the increased porosity and low bone mineral density of individuals with osteoporosis.
Common [4] 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 ...
Osteonecrosis of the jaw (ONJ) is a severe bone disease (osteonecrosis) that affects the jaws (the maxilla and the mandible). Various forms of ONJ have been described since 1861, and a number of causes have been suggested in the literature. Osteonecrosis of the jaw associated with bisphosphonate therapy, which is required by some cancer ...