3/21/07, EE reported pain in left shoulder while tossing a truck headrest to coworker. EE was seen by a dr who ret'd EE to work on next shift. 5/21 EE off work due to pain. EE had rec'd cortis one treatment in Feb. EE has pre-exist condition & treated for pain prior to 5/21 report. Determined likely to accumlated trauma disorder.