Disclosed is a gene expression panel that can be used to predict prostate cancer (PCa) progression. Some embodiments provide methods for predicting clinical recurrence of PCa. Some embodiments provide a method for treating a patient with prostate cancer, the method comprising: detecting expression levels of a collection of signature genes from a biological sample taken from said patient, wherein said collection of signature genes comprises at least NKX2-1; and correlating expression levels of said collection of signature genes with prostate cancer-related mortality to identify whether the patient is at risk of prostate cancer-related mortality.