Endocrine Abstracts (2011) 26 P472

Incidental papillary thyroid microcarcinoma: a retrospective study

R Rangel, A Afonso, L Matos, F Fonseca, L Cortez, P Tavares & A Agapito


Curry Cabral Hospital, Lisbon, Portugal.


Introduction: Recent data reveal that in the last 25 years it has been a 2.4 fold increase in thyroid cancer, with concomitant rise in thyroid microcarcinoma cases. The main purpose of this study was to analyse the surgical indications that leads to incidentally noted papillary microcarcinoma diagnosis.

Methods: We analysed clinicopathologic data of nineteen cases of incidentally found papillary thyroid microcarcinoma, from 1244 thyroid surgeries realized in our institution between 2005 and 2010.

Results: The mean age was 53.8±9.2 years old. Female to male ratio was 3:1. Mean tumor size was 5.7±3.01 mm. Hashimoto thyroiditis was detected in 4 cases. Multinodular nontoxic goiter was the endocrinological reason of consultation in 63%. The surgical indication was the increase nodule volume in 43% of the cases, indeterminate cythology report in 21%, nodule diameter >4 cm in 21%, Graves disease and multinodular toxic goiter in 5% each. Total thyroidectomy was primary realized in 13 cases and completed in 2 with multifocal disease.

Conclusions: The main surgical indication behind the incidental papillary microcarcinoma is the increase of nodule volume.

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