Can my elderly mother sue a dr. who failed to diagnosis water in her knee.. she was complaining about this for over 5 years. New dr found it rgt away.

I am sorry to hear that your mother has suffered for five years with her knee.  With respect to your question, failure to diagnose can be a basis for a negligence claim against a physician. There are a number of facts, however, that will need to be considered and reviewed before determining whether there is a valid claim to be brought against her former physician. If you are interested in speaking with me further about your mother's potential claim, I would be more than happy to do so.  My name is Jessica Lynn Dagley and I am an attorney with the Spellmire Law Firm.  My phone number is 312-258-9400 and my email address is jld@spellmirelaw.com.  I hope your mother is feeling better and look forward to hearing from you.