The present invention relates to an in vitro method for assessing the risk that a subject suffers from a cancer, comprising measuring the expression level of Proline/arginine-rich end leucine repeat protein (PRELP) in cells from said subject, wherein an increased expression level of PRELP, as compared to healthy donors, indicates an increased probability of said subject suffering from cancer. It further relates to antibodies specific for PRELP and their use in diagnosis and therapy as well as a method for indicating a cell as a cancer cell.