[Minimal residual disease in malignant diseases of the blood I. Background and pre-clinical validation].

In haematological malignancies, molecular markers like fusion DNA from balanced translocations, point mutations, or over-expressed genes can now be used not only for diagnosis, but also for determination of the minimal residual disease (MRD) after cytoreduction with a sensitivity by far exceeding that of previous methodologies. The sensitivity of quantitative polymerase chain reaction typically reaches a validated identification of 1 malignant cell in 100,000.