I should have also said that when a genital lesion has been biopsied, a scar in the forum of a skin bump can persists, often forever. Your dermatologist will know if this is the explanation. You don't need an "HPV expert" -- and nobody specializes specifically in HPV infections. Most dermatologist know as much about HPV as anybody else.
Welcome back to the forum.
I doubt your genital bump is due to HPV. On reviewing your previous thread, I see you tested positive for HPV. But so will 30-40% of all younger (age 15-30) sexually active persons. And since you apparently have had a similar bump "for years", I doubt it's a wart. It it is, imiquimod (Aldara) is not guaranteed effective. It cures about 60-70% of genital warts.
So my guess is your genital bump is not a wart, and may not be abnormal. Almost everybody has irregularities of the skin, whether genital or anywhere else. I agree with your plan to see a dermatologist, but I will not advise you to ask for a biopsy or anything else. Just describe what has gone on, then let her or him evaluate it and decide what to advise. All things considered, I don't think you have anything to worry about.
Regards-- HHH, MD