Mutation spectrum of the APC gene. (A) The spectrum of APC mutations identified among families from the Swedish Polyposis Registry showing the distribution between previously reported and novel mutations in our patients. (B) A schematic representation of the APC coding region, shown in the same scale as in (A). The arrow with an asterisk indicates codon 24 and the second arrow points at codon 184. (C) Distribution of six large deletions found in seven unrelated patients of the Swedish Polyposis Registry. Novel deletions are marked with an asterisk. Patient numbers are shown to the left. Scale as in (A).