Trends in morbidity on the basis of newly-reported cases of malignant skin melanoma (172 ICD) and other skin neoplasms (173 ICD) in Czechoslovakia during the period 1961--1972.

According to newly-reported cases of all malignant neoplasms of the skin (172 + 173 ICD) morbidity rate for the period 1961--1972 showed a rising trend of statistical significance only in Bohemia; while in Slovakia it persisted at a practically steady level throughout the period followed. Malignant skin melanomas (172 ICD) were on the increase in both regions, the rate being of statistical significance only in men in Bohemia. Morbidity from other malignant skin neoplasms (173 ICD) during the same period showed a stable pattern in Slovakia while it rose steadily in a significant degree in both, males and females in Bohemia. The causes for these varying trends must be further analyzed.