The present invention relates to a method for processing a subject's genomic data comprising (a) obtaining a subject's genomic sequence; (b) reducing the complexity and/or amount of the genomic sequence information; and (c) storing the genomic sequence information of step (b) in a rapidly retrievable form. The present invention further relates to a method wherein the step of reducing the complexity and/or amount of the genomic sequence information is carried out by cropping said genomic sequence information except for signature data pertaining to a disease or disorder, or by aligning a subject's genomic sequence with a reference sequence comprising signature data pertaining to a disease or disorder. Furthermore, the invention relates to a method wherein the use of a subject's functional genetic information, in particular gene expression data is included, as well as to a method, wherein the information is encoded in matrices and decoded and represented based on Markov chain processes. The obtained information can also be used for diagnosing, detecting, monitoring or prognosticating a disease and/or for the preparation of a subject's molecular history. In addition, a corresponding clinical decision support and storage system, preferably in the form of an electronic picture/data archiving and communication system, is provided.