depending on how you are feeling ... i ve had lymphoma and sometimes biopsies came out benign when they actually werent but the fact that i was having so many other symptoms was the clue
Outside of a lab slipup, odds of misreading the slides are probably very low. I'd get the actual report and see if there is any equivocal language in it.
And yes, if that one is good then they are probably suffer from the same malady - which is not cancer.