Katie Gutierrez, 19 of Eunice, is fighting for her life. Gutierrez suffers from a form of cancer called craniopharyngioma and with her last brain surgery on Aug. 9 causing a stroke in her brain stem, her battle for life is getting tougher. Katie was diagnosed with craniopharyngioma, a brain tumor derived from pituitary gland embryonic tissue, on Sept. 10, 2009 …