RT Journal Article SR Electronic T1 The Effect of 131I Therapy on the Eradication of Helicobacter pylori in Patients with Thyroid Disorders: A Preliminary Study JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 144 OP 147 DO 10.2967/jnmt.123.266508 VO 52 IS 2 A1 Pourfarzi, Farhad A1 Pakrouy, Hossein A1 Mohammadian Erdi, Ali A1 Faghfuri, Elnaz YR 2024 UL http://tech.snmjournals.org/content/52/2/144.abstract AB The leading cause of gastritis and its complications is Helicobacter pylori. Radioactive iodine (131I) accumulates significantly in the stomach after consumption. On this basis, we decided to determine whether different doses of 131I in the stomach would be effective in eradicating the infection. Methods: All patients with hyperthyroidism or differentiated thyroid carcinoma who were referred for 131I treatment were invited to the study. A stool antigen test was conducted before consumption of 131I (0.15–5.5 GBq) and was repeated 2 mo later to detect H. pylori infection. Results: H. pylori positivity was found in 51.8% (14/27) of the patients. At 2 mo after treatment, 13 of the 14 patients with differentiated thyroid carcinoma or hyperthyroidism who had been identified as positive for H. pylori stool antigen before 131I administration were still positive, representing a nonsignificant eradication rate of 7.1%. Conclusion: Administration of 131I to patients with H. pylori did not show potential to eliminate the infection.