MARK2 and Familial prostate cancer: PAK‐1, a serine/threonine kinase, was suggested to play a major role in various cancers.27 Studies have even suggested that PAK‐1 is a tumor oncogene and a therapeutic target for the treatment of cancer.13, 15 Compared to prostate cancer, there are limited studies on the role of PAK‐1 in other cancers.