Is it true that lung cancer asymptomatic in its early stage?

Yes: And it is a reason that the national lung cancer screening project results, suggesting ct scans can reduce lung cancer and population mortality.

Commonly: With growth, bleeding, airway obstruction, cough, weight loss and pain can occur.

Usually: Unfortunately, early lung cancer is often asymptomatic. Symptoms may include persistent cough, bloody cough, pain, short of breath. The following link may assist you in the possible symptoms: http://goo.Gl/vvhhy there is screening for appropriate candidates to help find it early.