In your Mom’s case, while I do not have all the details on the MRI report, it sounds like the physicians are concerned about the thickness of the lining of her uterus as seen on MRI.
Kwimeko kaMama wakho, noxa nje ndingenazo zonke iinkcukacha zengxelo yeMRI, kuvakala ngathi oogqirha baxhalatyiswe kukutyeba kwenwebu yesibeleko sakhe okubonwe kwiMRI.