Home ยป What is the incidence of second primary lung cancers after the primary tumor has been successfully cured? Cancer MCQs What is the incidence of second primary lung cancers after the primary tumor has been successfully cured? January 11, 2022 5 Views Q. What is the incidence of second primary lung cancers after the primary tumor has been successfully cured? A. 1% B. 2% C. 5% D. 10% Answer: 5%