Recurrent Inverse Necrotizing Infundibular Crystalline Folliculitis

    April 2024 in “ Journal of Cutaneous Pathology
    Marina Kristy Ibraheim, Leslie Storey, Jeffrey P. North
    TLDR Recurrent NICF is a rare skin condition with unclear causes, involving follicle inflammation and crystal deposits.
    This case study discusses a rare condition known as necrotizing infundibular crystalline folliculitis (NICF), characterized by folliculocentric papules in seborrheic areas. Only 23 cases have been documented, with some linked to specific drug therapies. The condition involves bacterial or yeast colonization, and its cause is unclear, though it may involve microbiome imbalances, sebaceous gland issues, and disrupted EGFR signaling. Histopathology shows follicular rupture, inflammation, and crystal deposits. The study presents a case of recurrent NICF in the inguinal region, highlighting its spontaneous occurrence. No conflicts of interest were reported by the authors.
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