The quality of applications for pathology residency continues to go up, for both AMG and IMG applicants. I personally think that if a program disregards an excellent IMG applicant, they are doing themselves a disservice. That being said, I agree with beary. If Columbia offers you an interview, they are interested. I wouldn't count yourself out by any means. And if you impress during your interview, why shouldn't they rank you high? Again, if they rank you low just because you're an IMG, they are doing themselves a disservice.
I wish you the best of luck.