According to the Journal of Thoracic Oncology, there are 5 stages of<unk> <unk> <unk><unk>  based on the severity and incidence. Each stage is assigned a grade and a description that designate disease severity.
Superior vena cava syndrome staging
Superior vena cava syndrome physical examination
Mediastinitis diagnostic criteria
Mediastinitis classification
Mediastinitis physical examination
Pulmonary embolism classification
Hemoptysis laboratory findings
Mediastinitis laboratory findings