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Inicio Revista Española de Patología Initial assessment of “Gissell's stain”: A novel histopathological metho...
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Vol. 56. Issue 4.
Pages 219-226 (October - December 2023)
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Vol. 56. Issue 4.
Pages 219-226 (October - December 2023)
Original
Initial assessment of “Gissell's stain”: A novel histopathological method for the identification of Helicobacter pylori
Valoración inicial de la tinción de Gissell, un nuevo método histopatológico en la identificación del Helicobacter pylori
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Gian Carlos Ramirez Ubillusa,
Corresponding author
gian.ramirez@upsjb.edu.pe

Corresponding author.
, Mercedes Bravo Taxab,c, Renier Cruz Bacac, Ricardo Neira Montoyad, Eduardo Sedano Gelvetd
a Escuela de Tecnología Médica, Universidad Privada San Juan Bautista, Lima, Peru
b Laboratorio Oncológico Taxa, Lima, Peru
c Instituto Nacional de Enfermedades Neoplásicas, Servicio de Anatomía Patológica, Lima, Peru
d Hospital María Auxiliadora, Servicio de Anatomía Patológica, Lima, Peru
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Table 1. Description of the sample (n=99).
Table 2. Inter-observer agreement and diagnostic capacity of each staining method.
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Abstract
Introduction and Objectives

The histopathological identification of Helicobacter pylori using the routine method (haematoxylin–eosin) is not only very difficult but also has low sensitivity. Giemsa staining is often used in addition, but different protocols do not produce homogeneous results. Furthermore, the Gold Standard recommended by the European Helicobacter Pylori Study Group has been applied in very few studies, thus resulting in uncertain outcomes. Therefore, a new staining method is required to overcome these limitations. The aim of this study was to evaluate the diagnostic capacity and inter-observer agreement of “Gissell's stain”.

Material and Methods

A cross-sectional study evaluated 99 gastric paraffin blocks from a private laboratory. Three sections were prepared from each block, and haematoxylin–eosin (HE), Giemsa and “Gissell's stain” methods were applied. The kappa statistics, sensitivity, specificity, and predictive values were calculated.

Results

“Gissell's stain” obtained the highest inter-observer agreement (kappa=0.87) compared to the other two methods (HE, kappa=0.51; Giemsa, kappa=0.83). It also obtained the best sensitivity and negative predictive value (97.1% and 98.3%, respectively) compared with the other two methods (HE: 68.6% and 85.1%, respectively; Giemsa: 88.6% and 93.9%, respectively).

Conclusions

Given its unique characteristics (fast, cheap, accessible, and easy to use), in addition to its statistical reliability, “Gissell's stain” has great potential for routine use in the identification of H. pylori.

Keywords:
Helicobacter pylori
Azure stains
Histological techniques
Resumen
Introducción y objetivos

La identificación histopatológica del Helicobacter pylori, utilizando hematoxilina-eosina (HE) como método de rutina es frecuentemente dificultosa y con una baja sensibilidad. El método de Giemsa es usado a veces de modo adicional, pero diferentes protocolos no producen resultados homogéneos. Además, el método recomendado por el grupo europeo de estudio de Helicobacter pylori ha sido empleado en pocos estudios, resultando en datos discrepantes. Por tanto, un método alternativo eficaz podría superar estas limitaciones. El presente estudio valora la agudeza diagnostica y el acuerdo interobservador en la aplicación del método de Gissell.

Material y métodos

Un estudio interobservador de 99 biopsias gástricas provenientes de la practica privada. De cada caso se prepararon tres muestras teñidas correspondientemente con: HE, Giemsa y Gissell. Se procedió mediante estadística kappa a valorar la sensibilidad, especificidad y valores predictivos.

Resultados

La técnica de Gissell obtuvo el mayor acuerdo interobservador con un kappa con 0,87, comparado con la HE (kappa = 0,51) y Giemsa (kappa = 0,83). Además, obtuvo la mayor sensibilidad y valor predictivo negativo comparado con los otros dos métodos.

Conclusiones

Dadas sus características prácticas, tales como rapidez, economía, accesibilidad y facilidad de uso, además de su fiabilidad estadística, el método de Gissell posee un gran potencial para la identificación rutinaria del Helicobacter pylori.

Palabras clave:
Helicobacter pylori
Tinciones azules
Técnicas histológicas

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