It's been a week of medical education for me. On Tuesday, I watched Dr. Alice Roberts explain how a normal lymph node was no bigger than a baked bean. She had some bean-sized pig nodes to demonstrate, as well as a pig thymus gland (where T-cells come from). I still don't really know what a thymus gland does, but it was an interesting programme on the immune system.
I also received my copy of Dog Anatomy, by Peter Goody, that I'd ordered from Amazon, and can now be quite sure that Herbie's bulging bottom rib on his left side is due to his spleen. The ultrasound (way back in the mists of time) picked up that he had an enlarged spleen - and he still has. (For anyone squeamish, who doesn't want to see pictures of an enlarged spleen, don't look here.)
Herbie could show veterinary students where the lymph nodes are - every major node is lumpy. I wish he wasn't quite so educational.