There are some medical conditions and disorders that happen only in men. Diseases like prostate cancer, testicular cancer or diseases of men’s reproductive systems are exclusive to men. Diseases that are linked to the X chromosome are much more common in men, things like color blindness and hemophilia occur almost exclusively in men. There are a number of diseases that occur in both men and women but are much more prominent in men. Diseases like Parkinson’s, Lewy body dementia, and abdominal aortic aneurysms are much more prevalent in men.