We took her to the ER thinking she was having a stroke or that her brain tumor had come back. She had no other symptoms at all. Just expressive aphasia. After many tests they concluded it was a simple UTI. Can a UTI actually do that? They are saying it was not a TIA as it would have shown up on the MRI. It lasted about 12 hours and started to clear up. She was on an IV which could have flushed out some of the UTI bacteria but it wasn't treated with antibiotics until yesterday. Thoughts? Is it possible for a UTI to cause that or for a TIA to not show up on a CT or MRI?