Systemic Lupus Erythematosus in India: A Clinico-Serological Correlation.

Background and objectives Systemic lupus erythematosus (SLE) is a chronic multisystem disorder exhibiting a wide spectrum of clinical and immunological abnormalities. Skin is the second most affected organ; lesions may precede systemic manifestations and foretell systemic involvement. Correlation between systemic manifestations and immunological profile is known but the interplay between antibodies and cutaneous findings is an area of recent interest. The present study aims to evaluate the demographic differences, pattern and prevalence of skin lesions, and correlation between cutaneous, systemic manifestations, and serological profile in SLE. Methods A total of 40 patients diagnosed with SLE, fulfilling Systemic Lupus International Collaborating Clinics (SLICC) criteria (2012), who visited the Dermatology outpatient department between April 2019 to April 2020 were recruited. Demographic details, evaluation of cutaneous lesions as lupus erythematosus (LE) specific and LE non-specific, systemic examination, hematological tests, and serological profile findings were noted. Results The mean age of onset was 23.3 years with a female to male ratio of 19:1. Common LE-specific lesions were malar rash (77.5%), photosensitivity (70%), and generalized maculopapular rash (20%). Frequently occurring LE non-specific lesions were non-scarring alopecia (60%), oral ulcers (45%), and vasculitis (12.5%). Arthritis (77.5%) and nephritis (30%) were common systemic findings. Among 14 patients with cutaneous manifestations alone, 12 (85%) had antinuclear antibody (ANA), eight (57%) had anti-double-stranded DNA (anti-dsDNA), four (28%) had anti-Smith (anti-Sm) and anti-RO/Sjögren's syndrome antigen A (Anti-RO/SSA), three (21%) had anti-histone, and one (7%) had anti-ribonucleoprotein (anti-RNP) antibodies in serum. Conclusions Lower age at onset, high prevalence of photosensitivity, anemia, and alopecia with a low prevalence of Raynaud's phenomenon suggest environmental influence in the context of the Indian population. A positive immunological profile in patients with cutaneous involvement alone gives an opportunity to the caregiver to identify the disease process much before systemic manifestations are expressed.