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Revista Colombiana de Reumatología (English Edition) Anti-TIF1γ-positive dermatomyositis with interstitial lung involvement: Report ...
Journal Information
Vol. 32. Issue 4.
Pages 409-415 (October - December 2025)
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686
Vol. 32. Issue 4.
Pages 409-415 (October - December 2025)
Case report
Anti-TIF1γ-positive dermatomyositis with interstitial lung involvement: Report of two cases
Dermatomiositis anti-TIF1γ positivo con compromiso pulmonar intersticial: reporte de dos casos
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686
Pablo Arango Guerraa,
Corresponding author
pablo828@hotmail.es

Corresponding author.
, Santiago Monsalve Yepesa, Andrés Chavarriaga Restrepob, Carlos Jaime Velásquezc
a Specialization in Internal Medicine, Faculty of Medicine, Universidad CES, Medellín, Colombia
b Specialization in Rheumatology, Faculty of Medicine, Universidad CES, Medellín, Colombia
c Specialization in Rheumatology, Clínica Universitaria Bolivariana, Medellín, Colombia
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Table 1. Paraclinical tests of both clinical cases at the time of diagnosis.
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Table 2. Proportion of ILD in patients diagnosed with anti-TIF1γ positive DM and the proportion of cases with concomitant malignancy in the different series.
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Abstract
Introduction

The association of certain myositis-specific antibodies (MSA) with the development of interstitial lung disease (ILD) in relation to inflammatory myopathies, such as antisynthetase syndrome and anti-MDA5, is well known. However, the potential relationship with the anti-TIF1γ antibody is not well understood, as the reported cases to date are few and have not allowed for solid confirmation of this association. Most of the literature has focused primarily on the association with malignant neoplasms. We aim to include two new cases in the existing literature to support the assertion of the link despite its infrequency.

Objective

To report two cases of ILD associated with anti-TIF1γ positive dermatomyositis (DM).

Materials and methods

A description of the clinical characteristics of two cases of anti-TIF1γ positive DM with ILD and a comparison with analogous cases.

Results

Two cases are described, the first of a 47-year-old man and the second of a 57-year-old woman, both diagnosed with anti-TIF1γ positive DM with the presence of ILD. Underlying malignancy was ruled out due to the presence of the MSA in question, and other potential causes of ILD were excluded, leading to the initiation of immunosuppressive treatment in both cases.

Conclusion

It is essential to further investigate the relationship between inflammatory myopathy and how different MSAs, other than antisynthetase and anti-MDA5 are also associated with ILD. Finding two cases related to anti-TIF1γ and knowing that there are analogous cases generates this hypothesis.

Keywords:
Dermatomyositis
Myositis
Interstitial lung diseases
Pulmonary fibrosis
Case report
Resumen
Introducción

Se conoce con amplitud la asociación entre algunos anticuerpos miositis específicos (AME) y el desarrollo de la enfermedad pulmonar intersticial (EPI), en el contexto de miopatías inflamatorias como el síndrome antisintetasa y anti-melanoma associated differentiation protein 5 (MDA5). Sin embargo, la relación potencial con el anticuerpo anti transcription intermediary factor 1 (TIF1)-γ no es bien conocida, ya que los casos reportados hasta la fecha son pocos y no han permitido confirmar esta asociación de manera sólida, en tanto que la mayoría de la literatura se ha enfocado en el contexto de la asociación con neoplasias malignas. Buscamos que se incluyan dos nuevos casos dentro de los ya reportados en la literatura y que logren apoyar la afirmación del vínculo a pesar de su infrecuencia.

Objetivo

Reportar dos casos de EPI en asociación con dermatomiositis (DM) anti-TIF1γ positivo.

Métodos y materiales

Descripción de las características clínicas de dos casos de DM anti-TIF1γ positivo con EPI y compararlos con casos análogos.

Resultados

Se describen dos casos, el primero de un hombre de 47 años y el segundo una mujer de 57 años, en quienes se diagnosticó DM anti-TIF1γ positivo con presencia de EPI. Se descartó neoplasia maligna subyacente por la presencia del AME en mención y se descartaron otras potenciales causas de EPI, por lo cual se inició tratamiento inmunosupresor en ambos casos.

Conclusión

Es esencial investigar más sobre la relación que existe entre la miopatía inflamatoria y cómo diversos AME, diferentes de los antisintetasa y anti-MDA5, también se asocian con EPI. El hecho de haber encontrado dos casos de EPI en relación con antiTIF1γ nos ayuda a sustentarlo.

Palabras clave:
Dermatomiositis
Miositis
Enfermedad pulmonar intersticial
Fibrosis pulmonar
Reporte de caso

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