My husband took a very hard fall on a concrete walkway over a year ago. Shortly after, he started having numerous neurological symptoms (double vision, balance difficulties, speech difficulties, memory problems, cognitive dysfunction, etc). Before the fall, he was a normal, healthy man. The neurologist has run test after test. In fact, he told us that the only test he had not done yet was a lumbar puncture. The neurologist does not think that the fall is responsible for my husband's symptoms, however, over a year later, his condition remains a mystery to the neurologist. I still maintain that the fall my husband took HAS to be the problem. How else could he be normal one day and have all these problems the next? I believe he sustained a brain injury much like shaken-baby syndrome. A particular symptom that the neurologist is not aware of is that my husband started having a problem with some sort of fluid leaking from his ears. I have two questions: could that possibly be CSF leakage caused by the fall he took? and can TBI be present even though it has not shown up on any tests?