Originally Posted by apacolypz
It means that Kishi has decided to make it concrete that the Uzumaki come from the Senju family tree. Since the Sage's sons became Uchiha and Senju..without Zetsu or Madara going into detail about the lineage I assume he just said Naruto/Mito and Tsuanade are Senju.
Ok I was just checking.. Man I sooo want to remove the spoiler tags from my signature but I'll digress.It's kinda weird hearing someone else say it with me over a hundred chapters later. Welcome!