Dr. Oz isn't hoarding (that I know of) but his Web site has this feature on hoarding and how mental imbalance or illness can be behind it.
It's a matter of degree, of course. Our house is cluttered in places; but we don't have to walk around mountains of material to get out the door.
I have no problem throwing out most things.
But I do know we could get rid of a lot more junk--like long-outdated calendars.
What do you hoard?