Year of publication KRAS mutations (%) Number of cases Country Bornhold [42] 2008 13 58 Denmark Yom [46] 2005 29 15 USA Perez [44] 1999 4 31 Spain Saber [45] 1998 4 28 Denmark Frattini [43] 2006 50 17 Italy Our series 2012 14 38 France

Table 2: distribution of KRAS mutations in ethmoidal intestinal type adenocarcinoma according to the literature.

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