A 15 year institutional experience of well-differentiated follicular cell-derived thyroid carcinomas; impact of the new 2017 TNM and WHO Classifications of Tumors of Endocrine Organs on the epidemiological trends and pathological characteristics.
Endocrine
; 67(3): 630-642, 2020 03.
Article
em En
| MEDLINE
| ID: mdl-31838728
ABSTRACT
PURPOSE:
Our study aimed to describe the evolution of the rate of pathological subtypes of well-differentiated follicular-cell derived thyroid carcinomas (DTCs) in the Department of Pathology, Emergency County Hospital Targu-Mures, Romania over a 15 year period and to assess the impact the new 2017 WHO and TNM classifications of thyroid tumors had on our cases.METHODS:
The pathological data were retrieved from the original pathological reports. After applying the exclusion criteria the remaining cases were reviewed on a double-headed microscope and reclassified according to the 2017 WHO and TNM staging system. The follow-up data were collected from the Institute of Oncology Cluj-Napoca, Romania.RESULTS:
Our study included 396 cases of DTCs (375 papillary, 11 follicular, and 10 Hürthle cell carcinomas). PTCs revealed a significant increasing trend over the study period, whereas follicular and Hurthle cell carcinomas remain rare; 125/131 of noninvasive encapsulated follicular variant PTC (EFVPTC) were reclassified as noninvasive follicular thyroid neoplasms with papillary-like nuclear features (NIFTPs), resulting in a 33.3% reduction in the number of PTCs. According to 2017 TNM stage-grouping 31% of 271 patients with DTC were downstaged. Follow-up data were available for most of the patients (65.7%, mean period 58.1 months). All patients with noninvasive EFVPTC were disease free at the last clinical assessment.CONCLUSIONS:
The increasing rate of PTC was maintained even after exclusion of NIFTP. By applying 2017 TNM criteria, a significant number of DTC cases were downstaged into a more favorable group. Follow-up data highlight the indolent behavior of noninvasive EFVPTCs reclassified as NIFTPs.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Glândula Tireoide
/
Adenocarcinoma Folicular
Limite:
Humans
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article