Abstract

Author(s): Dantas Chagas, Paula Roberta1; Aquino de Oliveira, Mirella Gondim Ozias1; Nascimento da Silva, Bruna2; Ferreira Pinheiro Gadelha, Patrícia Calado1

Introduction: Total thyroidectomy and ionizing radiation are the main types of treatment for thyroid cancer. The restriction of iodine preceding radiation, for seven to fourteen days, is indicated for better uptake of ionizing iodine.

Objetive: To evaluate the dietary intake of cancer patients candidates for iodine treatment submitted to different periods of restricted diet in iodine.

Methods: Cohort study performed in patients of both sexes, older than 18 years, with differentiated thyroid carcinoma, attended at the Instituto de Medicina Integral Prof. Fernando Figueira. Two groups (A and B) were divided, which received dietary guidelines in iodine for seven and fourteen days, respectively. Food consumption was measured by applying the 24-hour recall. The data were analyzed in Sigma Stat version 13.0.

Results: A total of 59 patients were analyzed, with a average age of 49 ± 12.96 years, of which 57 (96.6%) were women. Both groups presented ingestion 30 to 50g / day of iodine, with good adherence to the guidelines independent of the time of restriction. The usual intake of groups was above adequate according to the Estimated Average Requirement for sex and age.

Discussion: Thyroid cancer is the most common endocrine system, with about 70% being female. Administration of the ablative dose 30 to 150 mCi of radioactive iodine is the preferred treatment of choice. The reduction of the daily intake promotes a greater uptake of radioactive iodine by the malignant cells. The restriction guidelines for iodine intake for seven or fourteen days are sufficient to favor a better prognosis of ablative treatment.

Conclusion: The evaluated groups followed the guidelines of the restricted diets in iodine (<50ug / day) for patients candidates for iodine therapy131, regardless of the restriction time.