Not necessarily because recurring chalazion can be a sign of possible cancer but the possibility is rare and apparently they pretty much look the same. The doctor looked at it and diagnosed it as chalazion because thats what they usually are 99% of the time. However i assume they took samples to test to make sure and when the results came back (which can take many weeks sometimes, esp in large hosputals and more esp with non-emergency samples). When the results came back they changed the diagnosis to reflect the lab results. It happens often and is not groubds for a law suit. Would you have prefered they said 'well, it MIGHT be cancer but we cant tell until the lab work comes back' then left you to worry yourself for weeks? What if it had turned out to be only a cyst after all and youd worried for no reason? They gave you the most likely diagnosis and didnt burden you with rare possibilities until they were sure. You should be thanking them instead of trying to figure out ways to get money out of them.
Auxurs' answer is right on the money. No pun intended. Medicine is a watch and wait and see and try this and that. There are no set cures for anything in medicine. I was told 30 years ago I have fibromyalgia. It's not curable. 20 years ago a dr was able to help me. The passed week an eye doctor told me he didn't think I had fibromyalgia which I really don't think I have. He learned a lot by looking in my eyes and he also has taken courses for older patients. Medicine is fluid. It's always changing. Good luck to you.