Correlation of Serum IgE Levels and Clinical Manifestations in Patients Presenting with Cutaneous Adverse Drug Reactions in a Tertiary Care Centre, Eastern Zone of India
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Abstract
Objective: To examine the correlation between serum Immunoglobulin E (IgE) levels and the clinical spectrum and severity of Cutaneous Adverse Drug Reactions (CADRs) in patients attending a tertiary care center in Eastern India, evaluating IgE as a surrogate marker of immunopathological severity. Design: Cross-sectional, institution-based observational study conducted over twelve months, integrating clinical, pharmacovigilance, and immunoserological assessments. Subjects/Patients: Seventy-three patients with clinically diagnosed CADRs, aged 10-70 years (mean 38.25 ± 14.58 years), with slight female predominance (52.1%). Methods: Patients underwent detailed history, lesion morphology classification, and WHO-UMC (World Health Organization - Uppsala Monitoring Centre) causality assessment. Serum total IgE levels and absolute eosinophil counts were quantified. Statistical associations between IgE elevation and severity were analyzed using chi-square and t-tests. Patients were stratified into Severe Cutaneous Adverse Reactions (SCARs) and non-SCARs, with drug classes systematically mapped. Results: Fixed drug eruption (51.6%) was most frequent; SCARs comprised 12.3% (Stevens-Johnson Syndrome, TEN, DRESS). Antibiotics (40%) and NSAIDs (26.3%) were leading culprits. Mean IgE was 373.4 ± 341.7 IU/mL. Elevated IgE (>100 IU/mL) occurred in 81% of SCARs versus 36.5% of non-SCARs (p < 0.001). Eosinophilia was noted in 26%, especially in DRESS. Conclusion: Elevated IgE strongly correlates with CADR severity, positioning it as a pragmatic biomarker for SCAR triage and immunodermatologic risk stratification.
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Copyright (c) 2025 Debalina Kanjilal, MD, Suhena Sarkar, MD, Birupaksha Biswas, MD

This work is licensed under a Creative Commons Attribution 4.0 International License.
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Debalina Kanjilal, MD, Department of Dermatology, Medical College Kolkata, Kolkata, India.
Department of Dermatology, Medical College Kolkata, Kolkata, India.
Suhena Sarkar, MD, Associate Professor, Department of Pharmacology, Medical College Kolkata, India.
Associate Professor, Department of Pharmacology, Medical College Kolkata, India.
Birupaksha Biswas, MD, Department of Pathology, Burdwan Medical College, 3A Khalisakota, Kolkata-700032, India.
Department of Pathology, Burdwan Medical College, 3A Khalisakota, Kolkata-700032, India.
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