<unk>  may be classified according to the onset and duration of symptoms into 2 groups: acute or chronic. Additionally, acute<unk>  may be classified according to the cause of the disease.
Mediastinitis classification
Mediastinitis diagnostic criteria
Lung abscess classification
Thymoma classification
Hemoptysis classification
Tonsillitis classification
Mediastinitis laboratory findings
Superior vena cava syndrome staging