Incidental papillary thyroid carcinoma

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Abstract

Introduction.Papillary thyroid carcinoma (PTC) is most common thyroid cancer with increasing incidence worldwide every year.[1] Papillary thyroid microcarcinoma (PTMC) is defined as PTC in size 10mm or less.[1,2] Significant part of PTC is incidental finding in thyroids previously considered as benign.Aim of study was to analyse rate of incidental papillary thyroid carcinomas.Material and Methods. Retrospective thyroid patient data since October 2015 were analysed. Altogether 581 patients underwent thyroid operation – 470 due to benign indications and 111 due to malignancy. Data were analysed regarding indications for surgery, operation type, morphology, tumour size, thyroid weight.Results. Forty-one (8.7%) PTC was incidentally found in patients operated due to various benign reasons – Group A. Indications for surgery were compression (n = 25), thy-rotoxicosis (n = 13) and primary hyperparathyroidism with concomitant benign thyroid disorder (n = 3). In 111 cases surgery was performed due to suspected (n = 53) or proved malignancy (n = 58) – Group B. Fine needle aspiration was performed in 19 (46.3%) patients from Group A, and in 110 (99.1%) – Group B. Unilateral procedures were more common in group A – 17 (41.5%), in Group B the method of choice was total or near-total thyroidectomy – 95 (85.6%) cases. In Group A mean tumour size was smaller comparing to Group B: 11.8 mm (1–70 mm) vs 15.8mm (1–70 mm). PTMC in Group A diagnosed in 28 (68.3 %) cases, from those five (17.8%) were multifocal. In Group B were 42 (37.8%) PTMC, multifocality noted in 12 (28.6%) cases. Among tumors >10 mm in diameter, multifocality noted in 4/13 cases in Group A vs 39/69 in Group B. Metastatic lymph nodes were less common finding in Group A – 2 (4.8%) vs B – 28 (25.2%). Among 152 PTC cases 36(27.7%) were follicular variant of PTC, from those 2 cases with so called noninvasive follicular thyroid neoplasm with papillary-like nuclear features. Mean thyroid weight in Group A was 73.4 g vs 31.4 g in Group B.Conclusion. PTC is not rare incidental finding in patients operated due to benign thyroid disorders. Mostly incidental PTC are PTMC but in some cases it could be large carcino-mas. Follicular variant of PTC could be found in cases of incidental PTC.
Original languageEnglish
Article number96
Pages (from-to)150-151
Number of pages2
JournalLietuvos Chirurgia = Lithuanian Surgery
Volume17
Issue number1-2
Publication statusPublished - 2018
Event9th Congress of Baltic Association of Surgeons - Klaipeda, Lithuania
Duration: 10 May 201812 May 2018
Conference number: 9

Field of Science

  • 3.2 Clinical medicine

Publication Type

  • 3.4. Other publications in conference proceedings (including local)

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