Patent ID: 8041514

Claim:
A computer-implemented method for judging a risk of recurrence of breast cancer, comprising steps of: obtaining a ratio of a specific activity for cyclin dependent kinase 1 (CKD1) and a specific activity for CDK2, and an expression level of at least one cyclin selected from the group consisting of cyclin B1 and cyclin E contained in a tumor cell of the breast cancer, wherein the CDK1 specific activity is a ratio of an activation value of the CDK1 and an expression level of the CDK1 contained in the tumor cell, and the CDK2 specific activity is a ratio of an activation value of the CDK2 and an expression level of the CDK2 contained in the tumor cell; first comparing a first threshold value stored in a memory with the ratio of the CDK1 specific activity and the CDK2 specific activity; second comparing a second threshold value stored in the memory with the expression level of the cyclin; judging a risk level of recurrence of breast cancer, on the basis of the first comparison result, the second comparison result and risk information which represents relationship of risk levels, a ratio of CDCK1 specific activity and CDK2 specific activity, and a expression level of the cyclin, and is stored in the memory; wherein each method step is executed by a computer processor.