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Vol. 56. Issue 2.
Pages 82-87 (April - June 2023)
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Vol. 56. Issue 2.
Pages 82-87 (April - June 2023)
Original
Effect of non-invasive follicular thyroid neoplasm with papillary-like features (NIFTP) terminology on surgical management concepts
La importancia de la terminología en el tratamiento de la neoplasia folicular no invasiva de tiroides con características de tipo papilar
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Khaled Abdelwahaba, Ahmed Abdallaha, Islam H. Metwallya, Shadi Awnya, Omar Hamdya, Khadiga M. Alib,
Corresponding author
drdijamali@yahoo.com

Corresponding author.
, Mohammad Zuhdya
a Surgical Oncology Department, Oncology Center Mansoura University (OCMU), Mansoura, Egypt
b Pathology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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Rev Esp Patol. 2023;56:e1-e510.1016/j.patol.2023.04.001
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Table 1. The demographic, clinical, operative, and pathologic criteria of the 34 patients included in the study.
Abstract
Background

Despite the strict diagnostic criteria recently proposed for non-invasive follicular thyroid neoplasm with papillary-like features (NIFTP), its incidence is still unknown. Employing a retrospective analysis of the follicular variant of papillary thyroid carcinoma (FVPTC), we investigated the diagnosis, prevalence and postoperative course of NIFTP.

Methods

We examined retrospectively the records of 112 patients who had undergone thyroid surgery and had a postoperative diagnosis of FVPTC at our hospital from 2010 to 2021. All clinical, radiologic, and pathologic features were evaluated.

Results

Only 34 (27.9%) patients met the strict pathologic criteria for NIFTP; 11 cases having been diagnosed as NIFTP initially and 23 after re-evaluation of histopathologic slides. None of the 11 NIFTP patients underwent a 2-stage operation, in contrast to 10 (29.4%) patients initially diagnosed as FVPTC who had a completion thyroidectomy after the initial hemithyroidectomy. The median follow-up was 14.5 (ranging from 0 to 78) months. None of the cases developed a recurrence.

Conclusion

To avoid unnecessary treatment or the follow-up advised for papillary thyroid carcinoma, clinicians and pathologists should be familiar with the terminology and the corresponding diagnostic criteria for NIFTP and their impact on management.

Keywords:
Non-invasive follicular thyroid neoplasm with papillary-like features
Follicular variant
Papillary carcinoma
Borderline thyroid malignancy
Resumen
Introducción

A pesar de los definidos criterios diagnósticos recientemente propuestos para la neoplasia folicular de tiroides no invasiva con características de tipo papilar, designada con el acrónimo NIFTP de sus siglas en inglés (non-invasive follicular thyroid neoplasm with papillary-like nuclear features), todavía no se conoce su incidencia real. Empleando un análisis retrospectivo de la variante folicular de carcinoma papilar de tiroides (VFCPT), investigamos el diagnóstico, la prevalencia y el curso postoperativo de la NIFTP.

Método

Examen retrospectivo de archivos de 112 pacientes operados de tiroides, y que tenían un diagnóstico postoperatorio de VFCPT en nuestro centro entre los años 2010 y 2021. Se evaluaron todos los datos clínicos, radiológicos e histopatológicos.

Resultados

Solo 34 (27,9%) pacientes cumplían los criterios patológicos estrictos de NIFTP; 11 casos habían sido diagnosticados inicialmente y 23 después de una reevaluación de las láminas histopatológicas. Ninguno de los 11 casos iniciales de NIFTP fue sometido a una operación de 2 etapas, sin embargo, en 10 (29,4%) de los pacientes diagnosticados primero como VRCPT se practicó una tiroidectomía completa después de la hemitiroidectomía inicial. El seguimiento medio fue de 14,5 meses (entre 0 y 78 meses). Ningún paciente desarrolló recidivas.

Conclusión

Para evitar un tratamiento excesivo o seguimiento tradicional aconsejado para el carcinoma papilar de tiroides, tanto los clínicos como los anatomopatólogos deben familiarizarse con la terminología y los criterios diagnósticos de la NIFTP, y como estos influencian en el tratamiento.

Palabras clave:
Neoplasia folicular de tiroides no invasiva con características de tipo papilar
Variante folicular
Carcinoma papilar
Tumores tiroideos de malignidad intermedia

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