Permanent damage can include,
Ending up on Hormone Replacement Therapy for the rest of your life.
You seem to think HRT is a good thing. I know Ive been told to be nice, but Oni, take it from somebody that IS on HRT, thats retarded. Do you want a family? I know sure as fuck I do. Its is VERY difficult when your on HRT.
This is more common with loooooong cycles. When testicular function has been shut down for so long, it can be extremely hard for your body restore its natural testosterone production. The risk of this happening can be reduced with the use of HCG.
However, if your unlucky enough this can happen with a 12 week cycle, even if you do a PCT.
gynecomastia (gyno, bitch tits)
Without the use of compounds such as arimidex on cycle, your e2 levels rise significantly.
this can in turn lead to gyno.
Most often, this can only be removed with surgery, but I have read a few logs of people being able to remove it with medication, but Im not sure on specifics, so I wont go into that here.
you can run test without arimidex, but IMO, you'd be silly to do so. As I said, a prevention is better than a cure.
There are obviously many more side affects that can arrise from the abuse (and even use) of steroids, depending on doses and what compounds.... But Ill leave it there.