One partial solution.
If it is data in an downloaded lab from the lab interface, you can print out a list of previous results. For example, if you want their HA1C,
1)just go to the most recent lab where that was taken.
2 Highlight Just That Test.
3) go to the top and on the little menu click "for this test" and then "show results for this test only".
It will give you a list of all of the patients HA1C results. You can print this, but you cannot graph it or export it to Excel. Not ideal, but you can get the list.
Of course, this is useless for tracking mammograms.