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|Classification and external resources|
Figure A shows the location of the lungs and bronchial tubes in the body. Figure B is an enlarged, detailed view of a normal bronchial tube. Figure C is an enlarged, detailed view of a bronchial tube with bronchitis. The tube is inflamed and contains more mucus than usual.
|ICD-9||466, 491, 490|
Bronchitis is inflammation of the bronchi caused by irritation. It may also refer to acute bronchitis or chronic bronchitis. It can be caused by infection or other causes such as smoking, or being exposed to cigarettes.