User blog comment:Sosuke Aizen008/Best part of Chapter 552/@comment-1535822-20131008084734/@comment-11051098-20131008202454

Hollow Ichigo, the real Zangetsu, is a hollow, but he is also Ichigo's Shinigami-powers, so they are 1 power. I think that's what was established. I suppose the united Hollow/Shinigami-powers are the reason why his Quincy-powers doesn't take any harm from his inner hollow.