Familial associations between cancer sites

The Utah Population Database links together genealogical records, the Utah Cancer Registry, and Utah death certificates and allows identification of c ancer clusters. Groups of individuals with cancers of some types tend to fa ll into related clusters within the genealogy. We examine the apparent tend ency of cases of two types of cancer to cluster together and distinguish re al clusters from chance occurrences. Some established associations are foun d, whereas some are surprisingly absent. Some new associations are also sug gested. (C) 1999 Academic Press.