panhypoproteinmia/protein losing enteropathy caused by either IBS or lymphoma

Does anyone here have any personal experience with this? My 4.5 yo MN DSH was just diagnosed last week. I happen to work for a vet, but this is something that isn't often seen in cats,so we are grasping at straws. This cat is semi-feral and can not be medicated orally, so we gave him 1mL of depo,.56mL of convenia, and 1mL of b12. We are operating with the assumption that it is IBD and not lymphoma, but we don't know for sure. I would love to hear from other cat parents that have dealt with mysterious protein problems with their cats. Thank you so much!

I have come across this in my research, but have not seen it as a topic here on TCS much. It's always more difficult when your cat has something that is rare. It seems PLE is more common in dogs. I guess if the assumption is that it is IBD, there may be some treatments for IBD that may help with the PLE?    Is it a matter of healing the gut and get it functioning properly again? Or is the PLE permanent? I wish I could be of more help. I did a quick search online and most of the recommendations are with prescription medication.

Thanks for the insight! Unfortunately, it's permanent. It can only be managed, not cured. There doesn't seem to be much info out there about it, other than it being rare. So far the steroid has him eating again and his attitude is much improved. I'll be giving weekly B12 injections at home and possibly using a low dose transdermal gel steroid, since it doesn't seem like there's much difference in the treatment protocols for lymphoma vs. IBD. We may do a biopsy further down the road, but that's a bridge we don't really want to cross unless necessary. As much as I'm not a huge fan of steroid use, I don't have many options given the lack of knowledge about this disorder in cats. Thanks again for taking the time to look into it. I anticipate many sleepless nights surfing the internet for any shred of research myself. While working in veterinary medicine is great most of the time, at times like these it can just be nerve wracking.