It's uncommon. As I said.
5% is not rare.
Hepatic Adenomas are common in steroid users. Most shrink of disappear, in my experience, when the abuse stops. Those that hemorrhage were removed for a time and now are more commonly embolized (ie could never become malignant because they are dead)
When I see an adult man (non-cirrhosis) with a liver mass (or masses), my first question is what stack he is on.
Most are scared enough to stop, some fools continue to abuse. I couldn't tell you what happens to them, because they never come back.
Only 4.2% of hepatic adenomas become malignant according to this article out of 1600 people and there was no mention of anyone being a steroid user. Again, HA's are rare and very few (4.2%) turn malignant.
Your statement that "Hepatic Adenomas are common in steroid users" is nothing more then a generalized statement with no proof. How common are they in your opinion and are there any studies to back this up? If an adult male "sees you" I have no idea what you mean by that, and he has a mass and he doesn't use AS then what steps do you take to find out what the cause is? I'm betting you don't since there is no way to know and will not change the course of action for treatment.
If the person is using steroids the Dr will automatically say it was caused by steroids and it will get charted and thrown in with the statistics that you will read about in one of these worthless studies. They reality is that there is no way to know what caused "it" as in mass which could be many different things even a cyst.
I've been around a long time and I have only seen one person who was an anabolic user who had a liver mass and it was a liver cyst and he was an extreme abuser of pain meds too. His Dr said there was no way of knowing what caused it. Of course this is not an HA but I am just giving this as an example. If one Dr says that he has seen "MANY" cases of hepatic adenomas in steroid users he is lying. I find it hard to believe that one DR would see hundreds of steroids users in his time in practice let alone many with HA.