Mrcp of abdomen was done in october 2017. now ultrasound detected 1 cm liver lesion. is it possible the lesion grew between 10/2017 and now? what test needed to confirm?

Imaging and biopsy: A lesion could have developed and grown to 1 cm, in two years. A radiologist could advise on what imaging study may help in elucidating the issue. Depending on imaging studies, you may need biopsy and/or removal of the lesion so that the tissue may be examined by a pathologist. Again, depending in the findings an interventional radiology may eliminate the lesion by radio-frequency ablation.