Amelia's tumor was in the right front of her brain. But when she was in the OR, she was lying on her stomach, with her head turned to her left. This means the surgeon couldn't have accessed her tumor.
The officer speaking to Meredith about Farouk's paperwork says the government is waiting for information from both DHS (Department of Homeland Security) and INS (Immigration and Naturalization Service). INS was abolished as part of the post 9/11 changes that created DHS. INS never existed after DHS was formed.