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Lesions are common in both the genders and become more vulnerable with age. However,itmaybenotedthathyperparathyroidismwithbonediseasehasbecome rare asthereisincreaseduseofscreeninglaboratoryexaminations. In the less developed nations, theremaybestillmanypatientswithhyperparathyroidismandother advanced bone diseases.<ref>http://www.bonetumor.org/tumors-disorder-metabolism/brown-tumor</ref>
Age and gender have an effect on the incidence of these lesions; they are more prevalent in women than men (though still common in both genders), and they appear more frequently with age. Due to the standard of medical care and screening in developed countries, it is increasingly rare for primary hyperparathyroidism to present with accompanying bone disease. This is not the case in less developed nations, however, and the two conditions are more often seen together.<ref>http://www.bonetumor.org/tumors-disorder-metabolism/brown-tumor</ref>
==See also==
==See also==
Revision as of 20:13, 14 January 2015
Medical condition
Brown tumor
The brown tumor is a bone lesion that arises in settings of excess osteoclast activity, such as hyperparathyroidism. It is not a true neoplasm, as the term "tumor" suggests; however, it may mimic a true neoplasm. Brown tumours are radiolucent on x-ray.
Brown tumours consist of fibrous tissue, woven bone and supporting vasculature, but no matrix. The osteoclasts consume the trabecular bone that osteoblasts lay down and this front of reparative bone deposition followed by additional resorption can expand beyond the usual shape of the bone, involving the periosteum thus causing bone pain. The characteristic brown coloration results from hemosiderin deposition into the osteolytic cysts. Hemosiderin deposition is not a distinctive feature of brown tumors; it may also be seen giant cell tumors of the bone.
Brown tumors may be rarely associated with ectopic parathyroid adenomas.
Epidemiology
Age and gender have an effect on the incidence of these lesions; they are more prevalent in women than men (though still common in both genders), and they appear more frequently with age. Due to the standard of medical care and screening in developed countries, it is increasingly rare for primary hyperparathyroidism to present with accompanying bone disease. This is not the case in less developed nations, however, and the two conditions are more often seen together.
