Publications by authors named "Sendhil Kumaran"

Article Synopsis
  • Hereditary angioedema (HAE) is a rare genetic disorder that presents differently in children versus adults, and research is limited in developing countries where treatments are often inaccessible.
  • In a study of 206 HAE patients, 61 were children under 18, with a median age of symptom onset at 6.2 years and diagnosis at 10.7 years, showing a median diagnostic delay of nearly 5 years.
  • The most common symptoms in children included facial swelling and extremity swelling, while gastrointestinal symptoms were less frequent compared to adults; the study represents the largest pediatric HAE cohort from a resource-constrained setting.
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Background: Deficiency of C1-inhibitor (C1-INH) protein, caused by pathogenic variants in the Serpin family G member 1 (SERPING1) gene, is the commonest pathophysiological abnormality (in ∼95 % cases) in patients with hereditary angioedema (HAE). C1-INH protein provides negative control over kallikrein-kinin system (KKS). Although the inheritance of the HAE-C1-INH is autosomal dominant, female predominance has often been observed in patients with HAE.

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Background: Hereditary angio-oedema (HAE) is a rare autosomal dominant disorder characterized clinically by recurrent episodes of nonpruritic subcutaneous and/or submucosal oedema. Laryngeal oedema is the commonest cause of mortality in patients with HAE. Prior to the availability of first-line treatment options for the management of HAE, mortality was as high as 30%.

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Introduction There is ambiguity regarding usage of tranexamic acid for melasma in India, be it in its pre-administration evaluation, administration route, dosing or monitoring. Hence, we conducted this study to understand various tranexamic-acid prescribing patterns and provide practical guidelines. Materials and methods A Google-form-based questionnaire (25-questions) was prepared based on the key areas identified by experts from the Pigmentary Disorders Society, India and circulated to practicing dermatologists across the country.

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Article Synopsis
  • Acral vitiligo is a challenging skin condition that often leads to psychological distress due to new lesions, and topical tacrolimus is explored as a potential preventive treatment.
  • A study with 60 patients found that applying tacrolimus 0.1% on both vitiliginous and normal skin (Group A) resulted in a greater reduction in lesion numbers (5.6%) and area (10.5%) compared to applying it only on affected skin (Group B, 2.3% and 4.6% respectively).
  • The results suggest that tacrolimus may effectively prevent new lesions and promote repigmentation when used on both affected and surrounding skin.
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Keloid, hypertrophic scars and basal cell carcinoma (BCC) falls under the category of non-melanoma skin cancer. Intralesional steroids, external beam radiation therapy, 5-Fluorouracil, cryotherapy, laser, etc are the available treatment options. However, recurrence has been reported with each type of treatment mode.

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This is an exciting phase of vitiligo research with the current understanding of vitiligo pathogenesis and its translation to successful treatment. The pathogenetic origin of vitiligo revolves around autoimmunity with supporting role from many other factors like oxidative stress, inherent melanocyte defects, or defective keratinocytes and fibroblasts. Vitiligo can be classified into segmental or non-segmental depending upon the clinical presentation, or it can be classified as progressing or stable based on the activity of the disease.

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Background: Literature on treating acquired dermal macular hyperpigmentation is sparse.

Aims And Objectives: To assess treatment response of mycophenolate mofetil in patients having acquired dermal macular hyperpigmentation.

Material And Methods: In this open-label, pilot study, patients of acquired dermal macular hyperpigmentation affecting at least the face and/or neck were included.

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Introduction: The COVID-19 pandemic dramatically disrupts health care around the globe. The impact of the pandemic on chronic urticaria (CU) and its management are largely unknown.

Aim: To understand how CU patients are affected by the COVID-19 pandemic; how specialists alter CU patient management; and the course of CU in patients with COVID-19.

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Background: Despite advances in surgical management of vitiligo, lesions on acral areas and bony prominences remain treatment refractory. There is lack of literature on the treatment efficacy of various surgical modalities over these treatment refractory sites.

Objective: To compare the efficacy of three common methods of grafting in vitiligo in known resistant areas.

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Cell adhesion is a complex process that involves multiple molecules on the cell surface (ie cell adhesion molecules [CAMs]), surrounding cells and extracellular matrix (ECM). Repigmentation in vitiligo is dependent on the ECM remodelling and cellular migration, primarily attributed to the transcriptional activation of matrix metalloproteinases (MMPs). In this study, we aimed to demonstrate the role of ETS-1 signalling in the regulation of MMPs and CAMs.

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Background: Granulomatous dermatitis due to noncontiguous involvement of Crohn disease (CD) of the gut has been described as metastatic CD (MCD). MCD is the rarest form of cutaneous manifestations of CD. This study aims to analyze the clinicohistological features of MCD in a tertiary care center of India.

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Background: Lichen planus pigmentosus (LPP) is an acquired disorder of hyperpigmentation affecting certain racial and ethnic groups.

Objective: To retrospectively analyze the demographic and clinical characteristics of LPP.

Methods: Clinical and demographic records of all LPP patients attending our pigmentary clinic from January 2011 to June 2018 were reviewed.

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