I run into something that looks like a lot like this when mushroom hunting in the DC area. What you have could be a boletinoid mushroom that has been attacked by something else. I'll see a bolete-shaped mushroom that's either a frosty white or a bright yellow like that, depending on how advanced the decay is. When I pick it up, it leaves a nasty yellow film and crumbles to nothingness. I have no idea what causes this, but I run into it a lot and it drives me nuts.

Also, I have no firmer basis for this comparison than "it kind of looks the same"...always tenuous at best in the world of fungi etc.