The group is composed of hematologists and hematopathologists. The main goal is to review all the cases included in the project and confirm the diagnosis and main pathological characteristics of the tumors including morphology, phenotype and general genetic and molecular alterations. The diagnosis of all cases included in the genomic study need to be confirmed by a panel of at least three hematopathologists. The Pathology Panel meets periodically to discuss the cases and reach a consensus on the diagnosis. This is one of the major requirements of the ICGC to assure that the comprehensive genomic studies developed in the samples included in the project correspond to precisely diagnosed tumor samples.