Did Jack the Ripper have medical knowledge?

Answer 1

The idea that the Ripper may have had some level of medical knowledge is derived from the fact that, in some cases, certain organs were removed from the bodies of his victims. Some doctors believed they detected medical precision in his cuts - others claimed he had no training whatsoever, not even that of a butcher.

There is no standard answer to this question, unfortunately. It would seem likely that the killer had at least some rudimentary understanding of anatomy, to have been able to remove both the uterus and a kidney in near pitch-black conditions. Whether that understanding came from a medical background, or from experience as a butcher, it is difficult to say for sure.
Since they never figured out for sure who he was, no one knows, but it has been speculated that he did, because of the classical surgical way he cut his victims.

Answer 2

This is another point of contention in this confounding case. There have been so many different opinions on just this one question. So lets go with the side of probablity.

After more that 120 years is seems that the most prevalent opinion of experts is that no he was probably not or did not show any signs of higher anatomical knowledge. The most convincing experts are the doctors that actually studied the Ripper's work up close.

In the case of Katherine Eddows,, Dr. George Sequeira, the first doctor on the scene and Dr. William Sedgwick Saunders who was present at the postmortem, were both in agreement that no special medical training was needed. At least in this case, where a kidney was removed both were of the opinion that anyone could have bought, borrowed or stole an anatomy book and had the same sucess. This goes a long way in putting this myth to bed.