2003 MRI showed focal dilatation central spinal canal within cord t7-t10. 2012 MRI shows prominent central canal T4 down thru t-10. Is it changed?

See a doctor. Discuss this with the doctor who ordered the mri, since without seeing the films and conferring with the radiologist there is no way to provide meaningful comparisons. Good luck, this may only be the way the interpretation was phrased.