Abstract: In a process for rapidly and inexpensively diagnosing malignant diseases or their precursor stages, samples of arterial and/or capillary blood and of venous blood are withdrawn from a patient and the percentage shares of three groups of blood cells in the blood samples are determined wherein a first group includes blood cells of a size ≦8 &mgr;m, a second group includes blood cells of a 9 &mgr;m and 10 &mgr;m and the third group includes blood cells of a size ≧11 &mgr;m. The percentage shares are multiplied by weighting factors &agr;1 and &bgr;1, and the values y=&Sgr;&agr;i[(Ni)A]−&Sgr;&agr;i[(Ni)V] and x=&Sgr;&bgr;i[(Ni)A]−&Sgr;&bgr;i[(Ni)V], are calculated and from the locations of x and y in an x/y coordinate system, the presence of Ca. corp. uteri or its precursor stages is determined.

Abstract: In a method of diagnosing a malignant disorder or its precursor stage, the percentage parts N.sub.i of blood cells in a size range of i=6 .mu.m to i=16 .mu.m in two blood samples of a patient, an arterial or capillary blood sample (A) and a venous blood sample (V) are determined based on the total number of blood cells in the arterial or capillary blood sample and the venous blood sample, the values obtained thereby a multiplied by a weighting factor .alpha..sub.1 and are then summed up and from the sums A and V, respectively the values x=A+V and y=A-V are calculated and the deviation of the values x and y from the values x and y of a healthy person are determined for diagnosing the disorder.