At the end of gestation, CRC, expressing Reelin [32] and INP, expressing Tbr2 [19], have a characteristic organization in the hippocampus: CRC are localized around the HF, while INP have migrated from the DNE, by the ventricle, along the DMS, have reached the HF and are found below the CRC layer (figure 1a). This evidence concerns the gene RELN and colorectal carcinoma.