death of bony tissue, usually adjacent to a joint surface where it is enclosed by avascular cartilage. It is usually caused by loss of blood supply (avascular necrosis) due to trauma and is a definitive feature in a variety of conditions, including Legg-Calvé-Perthes disease, sickle-cell disease, Gaucher's disease, epiphyseal infection and fractures, alcohol abuse, and high-dosage corticosteroids. Sites that are particularly susceptible include the head of the femur, the scaphoid and lunate bones of the wrist, the capitulum of the humerus, and the talus and navicular bones of the ankle. In its earliest stages there is localized pain without any changes visible on X-ray examination; a bone scan or MRI will assist with diagnosis.

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  • Osteonecrosis — Cabeza de fémur, abajo del corte de cartilago en la parte superior, se puede ver la osteonecrosis Clasificación y recursos externos …   Wikipedia Español

  • osteonecrosis — f. patol. Necrosis o muerte del hueso. Medical Dictionary. 2011. osteonecrosis necrosis ósea …   Diccionario médico

  • Osteonecrosis of the jaw — Osteonecrosis of the jaws Classification and external resources Osteonecrosis of the jaw of the upper left jaw in a patient diagnosed with chronic venous insufficiency ICD 10 M …   Wikipedia

  • osteonecrosis aséptica — f. patol. Necrosis ósea causada por una alteración de tipo vascular. La más frecuente es la de la cabeza del fémur; las causas pueden ser: 1) por rotura vascular ocasionada por un traumatismo, 2) por alteraciones sanguíneas, 3) por alteraciones… …   Diccionario médico

  • osteonecrosis — ▪ bone tissue death also called  necrosis of bone        death of bone tissue that may result from infection, as in osteomyelitis, or deprivation of blood supply, as in fracture, dislocation, Caisson disease ( decompression sickness), or… …   Universalium

  • osteonecrosis — noun Alternative name for avascular necrosis …   Wiktionary

  • Osteonecrosis — Bone death resulting from poor blood supply to an area of bone. Also known as aseptic necrosis or avascular necrosis. * * * The death of bone in mass, as distinguished from caries (“molecular death”) or relatively small foci of necrosis in bone.… …   Medical dictionary

  • osteonecrosis — /ˌɒstioʊnəˈkroʊsəs/ (say .osteeohnuh krohsuhs) noun Pathology the death of bone tissue from any of a number of causes, most commonly the loss of blood supply. {osteo + necrosis} …  

  • osteonecrosis — …   Useful english dictionary

  • Neuralgia-inducing cavitational osteonecrosis (NICO) — refers to presence of cavitations in jaw bones (mandible and/or maxilla) in conjunction with chronic facial neuralgia. The concept implies direct and causal relationship between the bone pathology (cavitations) and pain itself. Pain in this… …   Wikipedia

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