Epidemiology of carcinoid tumours in central Italy.

Between 1985 and 1991, 83 carcinoid tumours were diagnosed in the province of Florence where the Tuscany Tumour Registry is active. There were 44 males and 39 females. The age-adjusted incidence was 0.65 cases/100,000 population/year. The most common location was the lung (30.1%), followed by colorectum (25.2%) and small intestine (22.8%). The 5-year observed and relative survival rates were 70.8% and 78.9% respectively. The relative risk of developing multiple primary cancers was 0.79 (CI 95% 0.28-8.33).