Without periferfal accessories a rat is but a brain in a vat even if it did a little transference on our terms. I think it is just hype. There is not much discussion otherwise about Kant's use of the word ORGAN. I have thought that there might be some serious real errors in the science of immunology but I have followed but my salad and not my desert on this.
REading the article I think more of REVELATION than developmental oddities. I had my fair share of mice with cancer when I breed them for snakes so I know what a freak, a mammal can look like.