How dangerous is a melanoma in the pubic area of a man? My ex-husband has one the size of a quarter and he has had it now for two years, It is changing, getting thicker and larger. It is about an inch above his penis, directly in the center of the pubic region. When I was married to him, I never saw any type of growth. He is a heavy smoker and is now a recovering alcoholic only about 6 months sober after more than 30 years of drinking.