<unk>  or DON is a form of avascular necrosis where there is death of a portion of the bone that is thought to be caused by nitrogen embolism (blockage of the blood vessels by a bubble of nitrogen coming out of solution) in divers. Although the definitive pathologic process is poorly understood, there are several hypotheses: *Intra- or extravascular nitrogen in bones, "nitrogen embolism". *Osmotic gas effects due to intramedullary pressure effects. *fat embolism *hemoconcentration and increased coagulability.
Dysbaric osteonecrosis
Osteoradionecrosis
Osteomyelitis
Acroosteolysis
Ischemic fasciitis
Osteopetrosis
Glossitis
Avascular necrosis