Thanks everyone for your replies. I understand prolactinomas are quite common and are usually treated with medication rather than surgery.

It's my DH. Returned a high IGF-1 level when they screened his blood for bone/athritis disorders because he has a persistant foot injury. They referred him for an MRI straight away and he appears to have a microadenoma. 1-3 mm.

Sammiejane - because this is causing a functional effect (ie altered blood chemistry) do you think they are more likely to do a bit more screening then watch & wait, or give medication, or proceed straight to surgery?

Also - with the patients you see, do many of them show the excessive growth signs? I'm really wondering about this because DH has always had very large & wide hands and feet, pronounced brow, big mouth/lips. I freaked out when I saw a picture of an acromegaly hand. But his hand has always looked like that. I'm wondering if this isn't something he's had all along.