Medical Definition of Radiation pneumonitis

1. Injurious effects of radiotherapy on the lungs. There are three phases in the reaction of the lungs to radiation injury: an acute phase occurring 1 to 2 months after exposure, a subacute phase 2 to 9 months after exposure, and a chronic or fibrotic phase more than 9 months after exposure. In the acute phase there is vascular damage, congestion, oedema, and mononuclear cell infiltration; in the subacute phase the alveolar walls are infiltrated with mononuclear inflammatory cells and fibroblasts; in the chronic phase, alveolar fibrosis and capillary sclerosis take place. (cecil textbook of medicine, 19th ed, p2343) (12 Dec 1998)



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Lexicographical Neighbors of Radiation Pneumonitis

radiation field
radiation fog
radiation hardening
radiation inactivation
radiation injuries
radiation leukaemia virus
radiation monitoring
radiation myelitis
radiation myelopathy
radiation of corpus callosum
radiation oncologist
radiation oncology
radiation pattern
radiation physicist
radiation physics
radiation pneumonitis (current term)
radiation poisoning
radiation pressure
radiation pyrometer
radiation risks
radiation shielding
radiation sickness
radiation sign
radiation signs
radiation syndrome
radiation therapy
radiation tolerance
radiation weighting factor
radiational
radiationally

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