Bruce Jenner mum's the word

 
Bruce Jenner is going through some radical physical changes that could be fundamentally altering who he is .... yet he is telling his family NOTHING.
Bruce went to a Beverly Hills plastic surgeon and scheduled surgery for a laryngeal shave -- which smooths out the Adam's Apple.

He told TMZ, "I just never liked my trachea. "He also wanted a smaller nose.

 Bruce has gone through other changes as well, including growing out his hair and nails in a pronounced way.

  And he seems to be growing breasts.

Bruce is saying nothing to his family about the changes ... some of which are markers of gender reassignment. 

Bruce told TMZ he's not becoming a woman, which means he's telling us more than he's telling his brood.  We're told Kim is completely in the dark -- he says nothing to her.  And she's not alone.