Do you happen to know, among your circle of friends and relatives and colleagues, a "pack rat" or two -- i.e., people who just can't seem to throw things away? On this edition of StudioTulsa Medical Monday, we offer a discussion of compulsive hoarding, which is an anxiety disorder affecting a great many Americans that makes it quite difficult for someone to discard with possessions, regardless of the actual value of those possessions. Our guest is Matt Paxton, host of the popular A&E television show called "Hoarders," who recently appeared in our city to give a free lecture on hoarding at the OU-Tulsa campus. As Paxton tells us today, most people who are hoarders have come to their affliction by way of grief or loss of some kind. And although it's quite common in our society, hoarding only became an actual listing in The Diagnostic and Statistical Manual of Mental Disorders -- which is, more or less, the unofficial dictionary of the American Psychiatric Association -- a couple of years ago.