CHICAGO — In the small family restaurant in Rogers Park Monday evening, Walter Guevara sat at a table and devoured yucca fries and Peruvian-style rice with stewed chicken, hungry despite his numerous cancer treatments.

The 18-year-old and his twin, José, are both fighting tumors. But after Walter experienced years of what his family describes as medical mistreatment in Peru, their mother, Maria Ysabel, decided to seek medical care in the United States. She saved money, filled out an application and waited months as Walter’s condition steadily declined before learning she and her sons had received their visas.

Last week, she cried tears of gratitude for the care Walter has received since their arrival to the U.S. this March, including their short trip from Rochester, Minnesota, to Chicago

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