A comparative study of two histological techniques for the identification of cytomegalovirus infection in colorectal biopsies from patients with chronic inflammatory bowel disease Estudio comparativo entre dos técnicas histológicas para el diagnóstico de infección por citomegalovirus en biopsias colorrectales de pacientes con enfermedad inflamatoria intestinal crónica idiopática

Background: the role that cytomegalovirus (CMV) plays in inflammatory bowel disease (IBD) is controversial. The diagnosis of CMV infection in IBD depends on viral identification with hematoxylin-eosin (HE) or immunohistochemistry (IHC). Our aim was to compare the sensitivity of HE and IHC for this d...

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Published in:Revista española de enfermedades digestivas Vol. 101; no. 10; pp. 697 - 701
Main Authors: M. L. de Castro, A. Tardío, V. del Campo, A. Estévez, J. R. Pineda, F. Domínguez, J. A. Hermo, J. Clofent
Format: Journal Article
Language:English
Published: Aran Ediciones 01-10-2009
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Abstract Background: the role that cytomegalovirus (CMV) plays in inflammatory bowel disease (IBD) is controversial. The diagnosis of CMV infection in IBD depends on viral identification with hematoxylin-eosin (HE) or immunohistochemistry (IHC). Our aim was to compare the sensitivity of HE and IHC for this diagnosis in IBD patients. Patients and methods: a case-control study. Our database was searched for IBD patients with HE- or IHC-based CMV-positivity from 1997 to 2007. Controls were selected among IBD inpatients matched for age and year of diagnosis with CMV. Their clinical characteristics were analyzed. HE and IHC were performed on biopsies from cases and controls at 6 months before and after inclusion in the study. In the statistical analysis, p values below 0.05 were considered significant. Results: ten IBD patients with CMV infection were identified. IBD-CMV patients were more steroid-resistant or steroid-dependent (p = 0.03), and underwent a higher number of colonic biopsies (p = 0.03). From 97 biopsies analyzed, 12 were HE-negative and IHC-positive, and 3 showed reversed results. The sensitivity of HE was 58.6%, 95% CI (38.9-78.3), and that of IHC was 89.7%, 95% CI (76.8-100). We did not find a good level of agreement between both techniques: kappa value 0.55, 95% CI (0.36-0.75). CMV positivity with IHC was associated with the use of more than one immunosuppressant drug, OR 13.5, 95% CI (1.2-152.2). Antiviral treatment was useful for CMV patients with steroid-dependent and steroid-refractory IBD. Conclusions: IHC shows a 30% higher sensitivity than HE for the diagnosis of CMV infection in IBD patients. There is no good level of agreement between both histological techniques.Introducción: el papel que el citomegalovirus (CMV) juega en la enfermedad inflamatoria intestinal (EII) es controvertido. El diagnóstico de infección por CMV en estos pacientes reside en su identificación en el tejido colónico mediante hematoxilina-eosina (HE) o inmunohistoquímica (IHC). Nuestro objetivo fue comparar la sensibilidad de ambas técnicas histológicas para establecer este diagnóstico. Pacientes y métodos: estudio caso-control, identificando en el periodo 1997-2007 aquellos pacientes CMV positivos con HE o IHQ. Sus controles fueron apareados por edad y año de diagnóstico de CMV en los casos. Se realizaron ambas técnicas en las biopsias de casos y controles obtenidas 6 meses antes y tras su inclusión en el estudio. En el análisis estadístico consideramos significativos los valores de p < 0,05. Resultados: encontramos infección por CMV en 10 pacientes. Estos sujetos presentaban más frecuentemente una EII resistente o dependiente de esteroides (p = 0,03) y un mayor número de biopsias de colon (p = 0,03). De 97 biopsias analizadas, 12 fueron HE-negativas e IHC-positivas y 3 mostraron resultados inversos. La sensibilidad de HE fue 58,6% IC95 (38,9-78,3) y para IHQ 89,7% IC95 (76,8-100). No encontramos una buena concordancia entre ambas técnicas histológicas: kappa 0,55 IC95 (0,36-0,75). La positividad para CMV se asoció al uso de más de un fármaco inmunosupresor, OR 13,5 IC95 (1,2-152,2). El tratamiento antiviral fue útil en la EII refractaria o dependiente de esteroides. Conclusiones: la IHQ posee una sensibilidad superior a HE (30%) para el diagnóstico de infección por CMV en la EII, no existiendo buena concordancia entre ambas técnicas histológicas.
AbstractList Background: the role that cytomegalovirus (CMV) plays in inflammatory bowel disease (IBD) is controversial. The diagnosis of CMV infection in IBD depends on viral identification with hematoxylin-eosin (HE) or immunohistochemistry (IHC). Our aim was to compare the sensitivity of HE and IHC for this diagnosis in IBD patients. Patients and methods: a case-control study. Our database was searched for IBD patients with HE- or IHC-based CMV-positivity from 1997 to 2007. Controls were selected among IBD inpatients matched for age and year of diagnosis with CMV. Their clinical characteristics were analyzed. HE and IHC were performed on biopsies from cases and controls at 6 months before and after inclusion in the study. In the statistical analysis, p values below 0.05 were considered significant. Results: ten IBD patients with CMV infection were identified. IBD-CMV patients were more steroid-resistant or steroid-dependent (p = 0.03), and underwent a higher number of colonic biopsies (p = 0.03). From 97 biopsies analyzed, 12 were HE-negative and IHC-positive, and 3 showed reversed results. The sensitivity of HE was 58.6%, 95% CI (38.9-78.3), and that of IHC was 89.7%, 95% CI (76.8-100). We did not find a good level of agreement between both techniques: kappa value 0.55, 95% CI (0.36-0.75). CMV positivity with IHC was associated with the use of more than one immunosuppressant drug, OR 13.5, 95% CI (1.2-152.2). Antiviral treatment was useful for CMV patients with steroid-dependent and steroid-refractory IBD. Conclusions: IHC shows a 30% higher sensitivity than HE for the diagnosis of CMV infection in IBD patients. There is no good level of agreement between both histological techniques.Introducción: el papel que el citomegalovirus (CMV) juega en la enfermedad inflamatoria intestinal (EII) es controvertido. El diagnóstico de infección por CMV en estos pacientes reside en su identificación en el tejido colónico mediante hematoxilina-eosina (HE) o inmunohistoquímica (IHC). Nuestro objetivo fue comparar la sensibilidad de ambas técnicas histológicas para establecer este diagnóstico. Pacientes y métodos: estudio caso-control, identificando en el periodo 1997-2007 aquellos pacientes CMV positivos con HE o IHQ. Sus controles fueron apareados por edad y año de diagnóstico de CMV en los casos. Se realizaron ambas técnicas en las biopsias de casos y controles obtenidas 6 meses antes y tras su inclusión en el estudio. En el análisis estadístico consideramos significativos los valores de p < 0,05. Resultados: encontramos infección por CMV en 10 pacientes. Estos sujetos presentaban más frecuentemente una EII resistente o dependiente de esteroides (p = 0,03) y un mayor número de biopsias de colon (p = 0,03). De 97 biopsias analizadas, 12 fueron HE-negativas e IHC-positivas y 3 mostraron resultados inversos. La sensibilidad de HE fue 58,6% IC95 (38,9-78,3) y para IHQ 89,7% IC95 (76,8-100). No encontramos una buena concordancia entre ambas técnicas histológicas: kappa 0,55 IC95 (0,36-0,75). La positividad para CMV se asoció al uso de más de un fármaco inmunosupresor, OR 13,5 IC95 (1,2-152,2). El tratamiento antiviral fue útil en la EII refractaria o dependiente de esteroides. Conclusiones: la IHQ posee una sensibilidad superior a HE (30%) para el diagnóstico de infección por CMV en la EII, no existiendo buena concordancia entre ambas técnicas histológicas.
Author J. R. Pineda
M. L. de Castro
A. Tardío
A. Estévez
F. Domínguez
J. A. Hermo
J. Clofent
V. del Campo
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Snippet Background: the role that cytomegalovirus (CMV) plays in inflammatory bowel disease (IBD) is controversial. The diagnosis of CMV infection in IBD depends on...
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SubjectTerms Citomegalovirus
Colitis ulcerosa
Crohn's disease
Cytomegalovirus infection
Diagnosis
Diagnóstico
Enfermedad de Crohn
Enfermedad inflamatoria intestinal
Immunohistochemistry
Inflammatory bowel disease
Inmunodepresión
Ulcerative colitis
Title A comparative study of two histological techniques for the identification of cytomegalovirus infection in colorectal biopsies from patients with chronic inflammatory bowel disease Estudio comparativo entre dos técnicas histológicas para el diagnóstico de infección por citomegalovirus en biopsias colorrectales de pacientes con enfermedad inflamatoria intestinal crónica idiopática
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