The pigmentation of the skin on my penis has changed. I have developed white patches that are surrounded by dark brown patches - Almost as if the pigment has shifted out of an area and concentrated in the area surrounding it. I'm 42 yo Caucasian male. Not painful or itchy etc. Still getting erections and ejaculating without problems. May be vitiligo but as far as my limited research shows the pigment disappears and doesn't concentrate as described above. Any ideas????