TP53 and hidradenocarcinoma: Two of eleven hidradenocarcinomas exhibited TP53 mutations in the series by Kazakoz et al. [17] Similar to findings reported by Biernat et al[15] and Kazakov et al[17], we found TP53 mutations in codon 248 of exon 7 and codon 273 of exon 8 in our 7 positive cases (Table 5).