Cancer occurrence in old age: Results of a population-based cancer registry in Semnan, Iran.

The proportion of elderly persons has increased in most countries during the last few decades, and will increase further in the coming years. A population-based study was here carried out to clarify the site-specific cancer-incidence rates in old age in Iran.A comprehensive search was undertaken to survey and register all new cancer cases during a 5-year (1998-2002) period among the indigenous population of Semnan Province aged 65 years or over....