At 15 months old, toddler Cara Greene's family started to notice a change in their daughter, whose ability to walk and even lift her arms to eat was vanishing before them, to the point where she no longer walked. Though they consulted many doctors, there were no answers to be found about Cara's condition. Her parents turned to personalized medicine to unravel the unknowns on the genetic level "to map a diagnosis and potential cure." Through the work of Dr. Goldstein, director of the Institute of Genomic Medicine at Columbia University, it was discovered that Cara inherited a paternal and maternal gene mutation affecting her ability to produce a protein, resulting in a debilitating B12 deficiency. Read more in the article below highlighted by ABC news for more on the role of precision medicine in Cara's diagnosis and ongoing treatment.