Arnold’s grandmother can not seem to part with things. Her h…

Arnold’s grandmother can not seem to part with things. Her house is so hard to walk through due to all the things she owns and refuses to get rid of. She even has a collection of old detergent bottles in the laundry room because she says it makes the room smell good, not realizing she can not even get to the washer to wash her clothes anymore. What diagnosis does Arnold’s grandmother exhibit?