Abstract
Interferon-stimulated gene 15 (ISG15) is a pivotal protein involved in antiviral defense and immune regulation. This study presents a remarkable case series of a consanguineous family with a homozygous variant in the ISG15 gene, leading to a complex interplay of intriguing dermatological manifestations and concurrent zinc deficiency. The range of cutaneous phenotypes observed in the family members, from severe ulcerative lesions to atopic dermatitis, highlights the intricate relationship between the identified genetic variant and dermatological conditions. Furthermore, zinc deficiency adds another layer of complexity to the understanding of these conditions. Comprehensive assessments of zinc levels were conducted for three siblings, while the fourth sibling's evaluation was impeded. This extraordinary case series offers a unique opportunity for scientific exploration, shedding light on complex genetic disorders and potentially paving the way for novel diagnostic and therapeutic strategies in medical science. The convergence of familial genetics, the homozygous ISG15 variant, and the captivating spectrum of cutaneous manifestations hold promise for advancing our understanding of these conditions and their underlying mechanisms.