What is the most effective way to prevent lung cancer?

Examination reveals an asymptomatic 1 x 1 cm red mass between teeth 7 and 8 . The patient is pregnant and in good health. Which of the following should be at the top of a differential diag-nosis list?

a. Erythroplasia b. Gingival cyst c. Candidiasis d. Pyogenic granuloma e. Peripheral fibroma

What does the detection of lymphatic channels on standard chest radiographs indicate?

a. Abnormally low pressures in the lymphatic channels b. Anastomoses with the pulmonary circula-tion c. Normal fibrotic changes that occur with aging d. System that is overwhelmed by excessive fluid