Occurrence and aetiology of lung cancer in Norway in the light of pathological anatomy.

Lung cancer is one of the most fascinating human cancer problems of to-day. That this form of cancer, in a series of countries, has increased to a terrifying degree in this century, is no longer doubted. A number of facts are, however, still unknown, or disputed. As the incidence of lung cancer varies considerably between the many countries which show a definite increase, and as conditions of life, social as well as personal, also vary, it is not unreasonable to expect to derive valuable information regarding the development of lung cancer from comparative geographic studies. In the present paper an attempt is made to elucidate the lung cancer problem through an epidemio-