RESUMEN
Review from the history of the Cancer Registration in Thailand during 1971-1980, shows that the patterns of cancer incidence are less different even if the data NCI received each year was not stable at the first stage of conducting this work (during 1971-1974) i.e., collaboration increased in some years and decreased in some years. Since 1975, the cooperation has been increasing, especially data from provincial hospitals but the cooperation from hospitals in Bangkok is still less due to problems such as lack of personnel who is directly in charge of this work, or problems on routine work system on cancer registration. However, data and statistics on cancer of Thailand which NCI has performed forms the base data for incidence of various types of cancer.