1. You cannot just "move" to the US. You must first be approved for immigration, or qualify for a long-tern visa such as student or employment.
2. To become a pathologist in the US, you must first earn a 4-year bachelors' degree from a US university, completing all prerequisite courses for admission to med school, then get accepted into medical school to earn a 4-year professional degree, the MD. Very few US med schools accept any foreign students. Those which will consider foreign applicant generally require proof that you & your parents have sufficient funds for all school + living expenses for all 4 years. Current minimum is USD500,000-750,000. (Undergrad will have already cost you over $250,000-300,000, possibly a lot more. Premed is very costly.)
3. You will not remain in US if you earn your bachelor's + MD in US. There are more American MD grads than residency positions for them, so don't expect any hospital to try to get a visa for foreigner for a pathology residency position. (Residency in US is the post-MD clinical training program, which lasts 3-7 years, depending on specialization.)
Your notions are not viable in the least.