New paper published in JAVMA
Many hyperthyroid cats (15% to 50%) have concurrent chronic kidney disease (CKD) that is “masked” and will not become azotemic until after treatment. Previous studies reported that mild-to-moderate azotemic CKD after methimazole or thyroidectomy does not adversely affect survival. Our objective was to determine whether hyperthyroid cats with masked CKD rendered euthyroid with radioiodine (131I) have shorter survival than 131I-treated euthyroid cats that remain nonazotemic.