Masked hyperthyroidism in a haemodialysis patient successfully treated by potassium iodide

Importance of specific reference values for evaluation of the deteriorating thyroid function in patients with end-stage renal disease on hemodialysis

“…2a, there was one patient with suppressed TSH level among those with ESRD (case #1). She was an 82-year-old woman with hyperthyroidism found in this study and reported before [38]. In brief, serum fT 4 level was 1.5 ng/dl, which was within the reference values for healthy control but definitely higher than the reference values for ESRD.…”

“…Serum fT 4 level of a patient with mild but definite Graves' hyperthyroidism was 1.5 ng/dl [38], which was within the reference values for the healthy controls, but was slightly but apparently higher than the reference values for those with ESRD. The possibility of overt thyrotoxicosis must be kept in mind even when serum fT 4 level is in the upper end of the reference values for healthy control (1.3-1.7 ng/dl), if atrial fibrillation or unexplainable weight loss is found during HD, especially when serum TSH level is suppressed.…”