Endocrine Abstracts

Introduction: The ATA guidelines 2015 suggests lobectomy as an option for low risk thyroid tumors between 1–4 cm, although there remains some controversy once some characteristics become apparent only on pathologic examination.

Objective/methods: Retrospective analysis of patients who underwent thyroid surgery in 2014 and 2015, with a histologic diagnosis of WDTC 1–4 cm in size and revision of the proportion of patients eligible for lobectomy with indication for completion thyroidectomy according to the ATA guidelines 2015.

Results: Three hundred and eighty eight patients who underwent thyroidectomy were analysed. Of these, 85 (21,9%) were include for final analysis. Exclusion criteria: history of cervical radiation, tumors <1 and >4 cm, macroscopic extrathyroidal extension (ETE), cN+, and bilateral thyroid nodules.

The mean age of the cohort was 49 years, 83,5% are females, none had an aggressive histology, 12 (14,1%) had vascular invasion, 5 (5,9%) had microscopic ETE, 3 (3,5%) had positive margins and 1 (1,2%) patient had positive lymph node metastasis.

Conclusion: (20%) of the patients with apparently ‘low risk’ WDTC who are eligible for lobectomy would have indication for completion total thyroidectomy according to the ATA guidelines 2015.