The Effect of Thyroid Hormone Withdrawal, Performed to Evaluate the Success of I-131 Ablation on Quality of Life and Psychological Symptoms in Female Patients With Low-risk Differentiated Thyroid Cancer
Abstract Purpose: There is a need to evaluate the treatment response in patients who have undergone radioiodine treatment (RIT) for differentiated thyroid cancer. Our study aimed to show thyroid hormone withdrawal (THW) effects on quality of life and psychological symptoms in female patients with low-risk, well-differentiated papillary thyroid cancer. Methods: We applied the short form-36 (SF-36) and Symptom Checklist-90-R (SCL-90-R) questionnaires to the patients in the euthyroid state who have referred a median of 9 months (6-13 months) after RIT to perform a diagnostic whole-body scan (dWBS) and to evaluate stimulated Tg. We applied the same questionnaire again when thyroid-stimulating hormone (TSH) was > 30 μIU/mL 4 weeks after THW (hypothyroid state). We evaluated the changes in questionnaire scores using the paired-samples t-test or the Wilcoxon signed-rank test. Results: Our study included 52 patients (median age 48 years, range 23-65 years). There was a statistically significant worsening in anxiety, psychosis, additional items, and general symptom index symptoms with the SCL-90-R questionnaire, physical functioning, role limitation due to physical health, energy/fatigue, emotional well-being, social function, general health, and health change with the SF-36 questionnaire. Conclusions: THW worsened the patients' psychological symptoms and quality of life. Thyrotropin alfa is an alternative to reduce side effects, but it can be costly and difficult to obtain in developing countries. In order to reduce the side effects of hypothyroidism and avoid the high cost, treatment response assessment can be done only in selected patient groups.