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Related Experiment Video

Updated: May 12, 2025

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis

Published on: December 15, 2011

Microvascular abnormalities between anti-TIF1-γ-associated dermatomyositis with and without malignancy.

Sehreen Mumtaz¹, Jordan Phillipps², Megan M Sullivan³

¹Department of Rheumatology, Mayo Clinic, 4500 San Pablo Rd S, Jacksonville, FL, 32224, USA. mumtaz.sehreen@mayo.edu.

BMC Rheumatology

|May 6, 2025

Summary

This summary is machine-generated.

Anti-TIF1γ-positive dermatomyositis (DM) shows distinct nailfold video capillaroscopy (NVC) findings, including capillary loss and microhemorrhages. These microvascular changes may help predict malignancy in DM patients, warranting further research.

Keywords:

Anti-transcription intermediary factor-1gamma (TIF)Cancer Dermatomyositis (DM)Idiopathic inflammatory myopathy (IIM)Malignancy Myositis-specific autoantibody (MSA)Nailfold video capillaroscopy (NVC)

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Published on: August 23, 2024

Area of Science:

Rheumatology
Dermatology
Oncology

Background:

Dermatomyositis (DM) is an immune-mediated myopathy linked to malignancy in up to 25% of cases.
Anti-TIF1γ-positive DM patients have a higher risk of associated cancers.
Nailfold video capillaroscopy (NVC) assesses vascular abnormalities but its role in anti-TIF1γ-positive DM with malignancy is unclear.

Purpose of the Study:

To characterize NVC findings in anti-TIF1γ-positive DM.
To assess the clinical relevance of NVC findings, especially in malignancy-associated cases.
To explore potential microvascular predictors of cancer in DM.

Main Methods:

Retrospective review of 19 anti-TIF1γ-positive DM cases and 18 idiopathic inflammatory myopathy controls.
Data collected from Mayo Clinic, Jacksonville between January 2010 and May 2024.
Analysis of NVC patterns including capillary density, microhemorrhages, and structural changes.

Main Results:

Anti-TIF1γ-positive DM cases showed significantly increased capillary density loss and microhemorrhages (p=0.057).
Higher frequencies of dilated capillaries, ramifications, and disorganization were observed.
While not statistically significant, cancer-associated anti-TIF1γ-positive DM had more hemorrhages and ramifications.

Conclusions:

NVC reveals microvascular differences in anti-TIF1γ-positive DM, particularly those with malignancy.
These findings suggest NVC may have potential in predicting cancer development in DM patients.
Larger studies are needed to further validate these promising microvascular observations.