The principal component scores of IgG‐SNA‐1, IgG‐WGA, haptoglobin‐SNA‐1, and PSA in the two‐dimensional X‐Y plot clearly segregated the cancer patients, the BPD patients and the normal subjects, which proves the validity of SNA‐1 and WGA as independent clinical markers for prostate diseases. Here, HP is linked to cancer.