John

Good start: some basic comments: A major component of 'loss of appetite" is LOSS OF TASTE. My taste buds are fried from 7200 GY and from the board postings, my gustatory journey of food tasting very bad, then just bad, then no taste, then cardboard, then okay -just bland was not unique. I suggest at least a passing mention that oral cancer treatments often destroy or substantially impair one's ability to taste, with a concommitant reduction in appetite. Of the medications you listed, only marinol would seem to address that (although a friend in San Francisco uses a "Vaporizer" which purportedly releases the THC without any combustion or burning since he cannot get DEA clearance for marinol.)
Secondly, the mechanical aspects of not being able to swallow are also a significant factor in anorexia. It hurt very much to swallow for months and I just toughed it out but trust me, when each swallow is painful, then your appetite declines.
It could just be me, but I did not see these two factors addressed enough as a distinguishing factor for OC anorexia in your draft.
I did learn a lot though about the difference between anorexia and cachexia - and it was very comforting knowledge. I have been worried about my weight never coming back and worried about cachexia but since I have kept and increased my lean body mass and muscle - just lost ALL the fat - that is one less thing to worry about. So Thank you John