I had papillary carcinoma of thyroid with peripheral tumors ablated after surgery with I 131 60 Mdi due to the tumors occurrence in my lung and abdomen. That was in 1985 and I am concerned I should be looking for signsand symptoms of leukemia. Can you enlighten me on what they may be?
The picture that you have portrayed is that of a thyroid cancer that had spread to lungs and liver. This is treated with surgically removing the thyroid and then ablating the remaining disease in the body with a Chat Doctor.  It has nothing to do with leukemia which is a type of blood cancer. Since you have had this treatment in 1985, it appears that you have completely been cured which is common with this cancer. All you need to do is a serum thyroglobulin every year and if it is normal then don't worry about the cancer returning.