Karla Flores was 18 when she started experiencing double vision. She knew something was wrong but struggled to find a diagnosis. Finally, she saw an ophthalmologist who referred her to a neurosurgeon. Flores, then 19, was diagnosed with a chordoma wrapped around her brain stem. Chordomas are incredibly rare — only about 300 are diagnosed per year in the United States, according to the Cleveland Clinic — and they are slow-growing, malignant tumors.
