Dermatomyositis: nailfold capillaroscopy patterns and a general survey.

Area of Science:

• Rheumatology
• Dermatology
• Autoimmune Diseases

Background:

• Dermatomyositis (DM) is an autoimmune inflammatory myopathy with characteristic skin and muscle symptoms.
• DM can be associated with various conditions including cancer, calcinosis, interstitial lung disease, overlap syndromes, and Raynaud's phenomenon.

Purpose of the Study:

• To evaluate the diagnostic and prognostic utility of nailfold capillaroscopy in dermatomyositis.
• To identify specific capillaroscopic features associated with DM and its complications.

Main Methods:

• Clinical and capillaroscopic data were collected from 43 DM patients.
• Diagnosis was confirmed using established criteria (Bohan–Peter, EULAR/ACR).
• Nailfold capillaroscopy was performed on all participants.

Main Results:

• Specific nailfold capillaroscopy findings included giant capillaries (84%), ramified capillaries (81%), and both (70%).
• Prominent subpapillary venous plexuses correlated with pulmonary involvement.
• Pericapillary space alterations were linked to DM severity and prognosis.

Conclusions:

• Nailfold capillaroscopy is valuable for diagnosing and predicting the prognosis of dermatomyositis.
• Specific nailfold capillaroscopy features, such as giant ramified capillaries, may warrant inclusion in future DM diagnostic criteria.