Table II.

Radiation therapy oncology group pneumonitis toxicity criteria.

Grade	Clinical symptoms
0	None
1	Asymptomatic or mild symptoms (dry cough); slight radiographic appearances
2	Moderate symptomatic fibrosis or pneumonitis (severe cough); low grade fever; patchy radiographic appearances
3	Severe symptomatic fibrosis or pneumonitis; dense radiographic changes; intermittent O2; requires steroids
4	Severe respiratory insufficiency; continuous O2; assisted ventilation
5	Mortality