Iranian regional cancer incidence is misclassified in neighborhood’s provinces
Cancer is one of the most important causes of death worldwide. There are 14 million new cases of cancer, which recorded globally each year (1). In Iran, cancer is an important health problem (2) and the gastrointestinal cancers are the most frequent cancers among Iranian males and second among females (3, 4). Cancer registration is an important source for measuring the burden of cancer in a population and these data would be useful for policy makers in order to responsible for the provision of health and oncology services, calculating burden of diseases, medical consultations, etc (5). The World Health Assembly passed a resolution in May 2005, recommending all governments to create and implement cancer control plans (6). Iranian ministry of health commenced a National Cancer Registry in 2004, and its data became available by 2006. On that date, in Iran, cancer services were overwhelmed and most patients, who went to a providing care facility, had advanced diseases, with no specific record of diagnosis. Therefore, a Comprehensive National Cancer Control Program (CNCCP) was designed (7) to assess this objective. However, the history of cancer registry foundation was backed in 1955, when the first activities to organizing cancer reporting were initiated by establishing the Cancer Institute at University of Tehran (8).