GEOGRAPHIC ASPECTS OF MALIGNANT DISEASE.

In view of recent publications describing a malignant lymphoma in African children, a review is presented of the geographical distribution of various cancers throughout the world. The epidemiological studies which have revealed these malignant tumours have provided valuable clues to the control of cancer and represent an effort to reduce and ultimately to eliminate certain forms of malignant disease. In Canada the distribution of cancer of the stomach has been observed to vary among provinces, being higher in Newfoundland than elsewhere. A study to determine the validity of this observation is currently being undertaken by the National Cancer Institute of Canada.