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The Consensus Conference on Brain Tumor De nition was facilitated by the Central Brain Tumor Registry of the United States and held on November 10, 2000, in Chicago, Illinois, to reach multidisciplinary agreement on a standard de nition of brain tumors for collecting and comparing data in the U.S. The Brain Tumor Working Group, convened in 1998 to determine the status of brain tumor collection in the U.S., outlined 4 recommendations of which the rst 2 guided the discussion for the Consensus Conference: (1) standardization of a de nition of primary brain tumors that is based on site alone, rather than on site and behavior, and that can be used by surveillance organizations in collecting these tumors; and (2) development of a reporting scheme that can be used for comparing estimates of primary brain tumors across registries.Consensus was reached on the collection of all primary brain tumor histologies found and reported in the brain or CNS ICD-O site codes (C70.0-C72.9 and C75.1-C75.3),including those coded benign and uncertain as well as those coded malignant.In addition, a comprehensive listing of histologies occurring in the brain and CNS, based
Bridget J. McCarthy (Mon,) studied this question.