Body Modification

Is sex change surgery (vaginoplasty, phalloplasty, metoidioplasty, electrolysis, mastectomy, hormone therapy) body modification?  Most transsexuals  don't relate to the concept of 'body modification', and the phrase is rarely found on web pages with transgender content. 
On the other hand, the Body Modification community don't seem to relate to changing sex as a type of body modification.  The Wikipedia article on Body Modification does not mention sex changes although the Category: Body Modification does have a sub category on Genital Modification which in turn has articles on Phalloplasty and Vaginoplasty.    BME, the specialist Body Modification Wiki which list 97 types of body modification does not have anything on sex changes.  
The similar yet different concept of Transhumanism which seeks to use technology to improve human bodies does acknowledge sex changes as a major step forward (although not on the Wikipedia page that I have just linked.   Here is a web page called "Transexuals Pave the Way for Transhumanists".

One individual who is into both Body Modification and being transgender is the avant-guard musician Genesis P-Orridge who describes him/her self as pandrogynous.