Cancer incidence in the United States and Puerto Rico.

This study compares cancer incidence in the United States National Survey areas and Puerto Rico for the period of 1969 to 1974. There are several differences between the 2 areas. Puerto Rico has a higher incidence of cancer of the mouth, pharynx, esophagus, stomach, cervix uteri, vulva, and penis. The Survey areas have higher incidences of cancer of the colon, rectum, lung, corpus uteri, female breast, and ovary. The differences between sexes are more or less the same as in other countries.