Good luck to your brother.
Singer's nodules are benign laryngeal papillomata that usually present in people who use their voice to excess (singers, screaming kids etc.) as hoarseness.
I was in the latter group of patient about 20 years ago and had my singer's nodule laser ablated as a day case. No complications (although I still can't sing!). I'm not sure what the current therapy is, so I'll kick for touch on that one.
Wrong, sorry, I can't let this go. Benign laryngeal papillomata are a far, far cry from a singer's nodule. I mean, seriously, seriously different.
I'm going to get on the attending soapbox for a minute and say that the single most important thing any medical professional has is integrity. If you don't know something don't say that you do. If this was an honest mistake, fine, I apologize for my rebuke, but I see far too often when medical students and residents don't know how to say "I don't know" when it is clear that's the case. Having said all that, I think you did make an honest mistake because you did punt on the treatment portion and I commend you for that.
For true vocal fold (TVF) nodules, see this site for a basic explanation:
http://www.entnet.org/healthinfo/throat/Vocal-Cord-Lesions.cfm
For more in-depth discussion, check out
www.emedicine.com, register, type in vocal nodules in the serach box and there is a great chapter on the issue delineating anything and everything you'd ever want to know.
No, electrocautery is the last thing you do to a nodule. The vast majority will resolve with speech therapy. The very few that don't can be excised with a microflap procedure using cold steel or sometimes CO2 laser, but I generally recommend the former, especially for small nodules, especially in professional voice users.