The identification of germline T gene duplication in familialchordomas [10]prompted us to perform quantitative real-time PCR in our set of sporadicchordomas using one set of primer/probe targeted to T and areference control primer/probe set targeted to MCM7. RelativeT∶MCM7 ratios were determined andnormalized against an average ratio established from a normal control run of 10non-chordoma genomic DNA samples (Figure 6). This evidence concerns the gene MCM7 and chordoma.