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Paget's disease of bone is the second most common metabolic bone disorder, after osteoporosis. [37] The overall prevalence and severity of Paget's disease are decreasing; the cause for these changes is unclear. [38] Paget's disease is rare in people less than 55 years of age, [7] and the prevalence increases with age. [38]
Chalkstick fractures are fractures, typically of long bones, in which the fracture is transverse to the long axis of the bone, like a broken stick of chalk. [1] A healthy long bone typically breaks like a hard woody stick as the collagen in the matrix adds remarkable flexibility to the mineral and the energy can run up and down the growth rings of bone.
Bone dysplasias, including Paget's disease of bone, fibrous dysplasia, enchondromatosis, and hereditary multiple exostoses, increase the risk of osteosarcoma. Li–Fraumeni syndrome (germline TP53 mutation) is a predisposing factor for osteosarcoma development.
A bone scan or bone scintigraphy / s ɪ n ˈ t ɪ ɡ r ə f i / is a nuclear medicine imaging technique used to help diagnose and assess different bone diseases. These include cancer of the bone or metastasis, location of bone inflammation and fractures (that may not be visible in traditional X-ray images), and bone infection (osteomyelitis). [1]
A pathologic fracture is a bone fracture caused by weakness of the bone structure that leads to decrease mechanical resistance to normal mechanical loads. [1] This process is most commonly due to osteoporosis, but may also be due to other pathologies such as cancer, infection (such as osteomyelitis), inherited bone disorders, or a bone cyst.
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Blade of grass sign (also known as flame sign [1]) is a radiologic sign referring to the lytic fronts seen in the leading edge of the long bone in Paget's disease. [2] It is usually seen as a wedge shaped area of radiolucency in the diaphysis of long bone. [1]
Osteogenesis imperfecta (IPA: / ˌ ɒ s t i oʊ ˈ dʒ ɛ n ə s ɪ s ˌ ɪ m p ɜːr ˈ f ɛ k t ə /; [4] OI), colloquially known as brittle bone disease, is a group of genetic disorders that all result in bones that break easily. [1]: 85 [9] The range of symptoms—on the skeleton as well as on the body's other organs—may be mild to severe.