Depigmentation of the penis

Hi.
Im 26 now. When I hit puberty my penis got the normal adult coloration, but in the next year or so, a patch of discolorated zone formed, quite rapidly and since then, once in a while (once in 8-9 years) it grows more.
What can it be? I mention that I have white skin and I only get red in the sun and I never had a proper sun tan, because is very dificult for me to get. Ppl always tell me that I'm white as cheeze :))
Also, more recently I got a nail fungus, so I will use Lamisil. Can that help my discoloration too? Since I would guess it might be some fungus involved?
Thank you.

[Alan Rockoff, MD]

This sounds like vitiligo.  It does not sound likke fungus.  Vitiligo is a common condition in which pigment goes away.  Cause is unknown.  Other than appearance, vitiligo has no significance.  I suggest you get a dermatologist to tell for certain whether you in fact have fungus and whether Lamisil is appropriate.  At that point you can have your penis looked at too.

Take care.

Dr. Rockoff