Let's do a little investigative work, shall we?

William Shakespeare
William Sha(tn)er

"TN" is, of coures, the abbreviation for "testicular neoplasia" which is associated with cryptorchidism. It becomes obvious from the foregoing to all but the very dense and unlearned that William Shatner is the reincarnation of William Shakespeare, who is well know to have suffered from cryptorchidism as a child and, indeed, into his early adulthood. The problem was only corrected by one "Moll Tearsheet" (who was rewarded by being advertised in one of the plays). It is believe that William Shatner also suffered from cryptorchidism, although it cannot at this time be proven. Perhaps someday it will be possible to examine HIS skeleton and determine the truth or falsity of this conjecture. In the meantime, the Bard still walks among us.

All, I think you will all agree, is now clear.