Nailfold capillaroscopy by digital microscope in an Indian population with systemic sclerosis

Area of Science:

• Rheumatology
• Dermatology
• Microcirculation Research

Background:

• Nailfold capillaroscopy (NFC) is crucial for diagnosing microvascular abnormalities in systemic sclerosis (SSc).
• Current NFC methods are underutilized due to high costs and limited accessibility.
• An inexpensive digital microscope offers a potential solution for wider NFC application.

Purpose of the Study:

• To evaluate the utility of an affordable digital microscope for NFC in systemic sclerosis (SSc).
• To correlate NFC findings with SSc disease subsets (diffuse and limited cutaneous) and skin involvement extent.
• To establish the diagnostic value of digital microscopy in SSc microvasculature assessment.

Main Methods:

• Nailfold capillaroscopy (NFC) was performed on 22 diffuse cutaneous SSc (DSS), 20 limited cutaneous SSc (LSS) patients, and 42 controls.
• A digital microscope at 30× and 100× magnification was used for NFC.
• Qualitative and quantitative microvascular changes were analyzed from digital micrographs.

Main Results:

• Capillary density was significantly lower in SSc patients (5.3 ± 1.4) compared to controls (8.7 ± 1.2).
• Disorganized capillary architecture was more prevalent in DSS (86.4%) than LSS (25%).
• Vascular deletion score (VDS) and scleroderma pattern (SP) were significantly higher in DSS and LSS patients compared to controls, correlating with modified Rodnan skin score (MRSS).

Conclusions:

• Nailfold capillaroscopy (NFC) changes in systemic sclerosis (SSc) are linked to disease subset and severity (MRSS).
• Digital microscopy provides a simplified, cost-effective NFC method for outpatient use.
• Results are comparable to traditional methods, enhancing accessibility for SSc diagnosis.