I am not familiar with either a wrong lab test for genital warts or a scar from
Aldara. If the test was a biopsy (I can't think of another relevant one), then the result is almost never definitive one way or another only suggestive. As for
Aldara, it can cause irritation, but not a linear scar, at least so far as I know.
I thin k you need a skin doctor to look at you and tell you what's actually going on. As to what can be done for the mark, it may be that there is nothing, but you'll never know until you actually find out what's there.
Good luck.
Dr. Rockoff