The Allegheny County medical examiner has yet to release the dead woman's identity.
Investigators believe the woman had been dead for several weeks. Officials don't believe foul play is involved.
Investigators say they found the woman's body in an apartment Thursday afternoon, after neighbors called 911 to report a foul smell. An autopsy is set for Friday.
Officials say they found other deplorable conditions in the home and are trying to determine why the daughters didn't report her death or otherwise call for help.
