Incidental papillary thyroid microcarcinomas in thyroidectomy specimens: A single-center experience from Turkey. 2019

Fatma Senel, and Hatice Karaman, and Aynur Aytekin, and Güler Silov, and Ali Bayram
Department of Pathology, Nose and Throat, Kayseri City Training and Research Hospital, Kayseri, Turkey.

BACKGROUND Papillary thyroid microcarcinoma (PTM) is a relatively common entity in the general population. PTM is often asymptomatic and is detected incidentally during the histopathological examination of thyroidectomy specimens from operations because of benign thyroid disease. OBJECTIVE The aims of the study are to determine the incidence of incidental papillary thyroid microcarcinomas (IPTMs) in our center, to examine the clinicopathologic characteristics of these tumors, and to present our experiences. METHODS This study includes 827 patients who underwent thyroidectomy operation in our center between January 2013 and June 2017 and were examined histopathologically in the Pathology Clinic. Patients' demographic characteristics, preoperative diagnoses, operative procedure, histopathological findings, and postoperative prognostic indexes are presented. CONCLUSIONS Of the 827 patients, 138 (16.6%) were diagnosed with a malignancy. Of these, 124 were papillary carcinoma, 5 were follicular carcinoma, 4 were lymphoma, 2 were medullary carcinoma, 2 were anaplastic carcinoma, and 1 was poorly differentiated carcinoma. The IPTM incidence rate was 8.01%; the multifocality and bilaterality rates were 23.3% and 13.3%, respectively. In 98.3% of IPTM cases, total thyroidectomies were performed, and in 1.7% of cases, subtotal thyroidectomy was performed followed by complementary thyroidectomy. No relapse or metastasis was detected in any of these cases. A careful histopathological examination of the thyroidectomy specimen is essential because IPTM is frequently skipped in fine needle aspiration cytology. We consider it best to perform total thyroidectomies because bilaterality and multifocality rates are high in IPTM. Long-term life expectancy in these tumors is quite good.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011379 Prognosis A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations. Prognostic Factor,Prognostic Factors,Factor, Prognostic,Factors, Prognostic,Prognoses
D002291 Carcinoma, Papillary A malignant neoplasm characterized by the formation of numerous, irregular, finger-like projections of fibrous stroma that is covered with a surface layer of neoplastic epithelial cells. (Stedman, 25th ed) Carcinomas, Papillary,Papillary Carcinoma,Papillary Carcinomas
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D013959 Thyroid Diseases Pathological processes involving the THYROID GLAND. Disease, Thyroid,Diseases, Thyroid,Thyroid Disease
D013961 Thyroid Gland A highly vascularized endocrine gland consisting of two lobes joined by a thin band of tissue with one lobe on each side of the TRACHEA. It secretes THYROID HORMONES from the follicular cells and CALCITONIN from the parafollicular cells thereby regulating METABOLISM and CALCIUM level in blood, respectively. Thyroid,Gland, Thyroid,Glands, Thyroid,Thyroid Glands,Thyroids

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