In 1978, Foucault contributed an introduction to the English translation of Georges Canguilhem’s The Normal and the Pathological. The French version is included in Dits et écrits as text 219. (No translator is indicated, which suggests the editors had access to the original French text.) Right at the end of his life, Foucault revised the text for a theme issue of Revue de métaphysique et de morale, published after his death and reprinted as Dits et écrits text 364. An online version of the latter is here. The second text was translated in Essential Works as “Life: Experience and Science”, Vol 2, 465-78.

In an editorial note Dits et écrits says “Épuisé, il ne put que modifier la préface… Il remit ce texte fin avril 1984; ce fut donc le dernier auquel il donna son imprimatur [Exhausted, he could only modify the preface… He submitted this text at the end of April 1984; it was therefore the last he approved for publication]”.

As far as I know, nobody has compared the two texts to see the modifications Foucault made. The full analysis is here.

Many changes are minor, but some are more interesting. Minor changes to punctuation, Georges replaced by G., etc. are not noted, but I hope all the other changes are. Corrections and additions are of course welcome.

There are lots of other resources on this site relating to Foucault – bibliographies, audio and video files, some other textual comparisons, some short translations, etc. They are listed here. There are resources relating to other thinkers and topics listed here.