Lincoln, Norrin, and Remley Niece (pictured here) were all diagnosed with Chiari Malformation, a rare disorder that causes the brain to extend into the spinal canal and occurs in one in 1,000 people. Lincoln, Norrin, and Remley Niece (pictured here) were all diagnosed with Chiari Malformation, a rare disorder that causes the brain to extend into the spinal canal and occurs in one in 1,000 people.