MALPRACTICE - Please, Do we have a case?

Of course you don't have a case. Doctors are people too, and some are better at treating certain things than others. Most doctors don't even deal with brain problems, because they aren't trained to - so it was probably good that they kicked your friend out.
Malpractice is when a doctor makes a preventable mistake that causes injury to the patient. For example, my grandmothers doctor put in her pacemaker without sterilizing the pacemaker and she deveoloped a bad infection and had to have it removed. She could have sued for malpractice. As for the second story, don't go around trying to sue everybody for your problems. The law is there to protect you, not to make you money or to serve as an outlet to your frustrations.
Now, if you could prove that her (first story) pancreatitis was a direct result of a preventable accident of her surgeon, that would be different. For example, if he left a sponge in there, or forgot to sterilize his instruments. But she could have developed pancreatitis as a complication of the surgery that was not preventable by the doctor, or it could be unrelated.

Milagros, if someone doesn't know how to treat something, why would you be angy at them for not treating it?

You wouldn't take your car the the hairdresser to get it repaired.

People go to Psychaiatrists, neurosurgeons, and councillors for brains. They are trained to fix brains. ER staff does not know how to deal with, nor do they have the equipment to deal with, chemical imbalances in the brain.

And yes, if any doctor, even a poor one, doesn't sterilize his or her instrument, that is malpractice. If they dropped a tic tac in someone's pancrea, that would also be malpractice.

A question about whether you have a case involves a trip to a lawyer who specializes in medical malpractice, not a question online from people who are only going to give their opinions without access to all of the facts.

Go to a lawyer. The first consultation is often free. Have all of your information available, including any records which are appropriate. And by appropriate, I mean what's on point. Don't just dump a stack of unsorted papers on a lawyer's desk -- a free consultation would very quickly turn into the lawyer either throwing up his or her hands in defeat or telling you to make an appointment for a time when he or she could better help you, and you'd have to pay for that appointment.

But that may be money well spent for you, so consider it. But like I said, get things together, it will save you money and time which will be very helpful if it turns out you do not have a case.

I say this as an attorney. Go and speak directly, face to face, with a professional. Don't rely on online advice. The Terms of Service of A2K prohibit us from offering you legal advice, and we won't just bend that rule "just this once". This part of our Terms of Service exists to protect us and you - you from throwaway (read: potentially very bad) advice, and us from the possibility of legal malpractice attaching.

Is Portal Star right? I have no idea, I'm not suggesting one way or another.

Now, on Monday, contact a local attorney and go about this the right way. It'll be worthwhile to you to know, even if the answer isn't the one that you're hoping for.

Milagros, you are just being absurd. You asked for an opinion. You got it. I happen to agree with Portal Star (Not Mortal Star, btw), but that's not the point, is it? You don't want an opinion; you want agreement or nothing. I leave you with the latter.