Histologically, it mimics subacute cutaneous lupus erythematosus, showing vacuolar interface dermatitis, epidermal atrophy, and a perivascular lymphocytic infiltrate with mucin deposition [48]. Langerhans cell histiocytosis (LCH), a clonal proliferation of dendritic cells, may present in neonates with crusted papules and erosions resembling seborrheic dermatitis or scabies [49]. This evidence concerns the gene MUC5AC and Langerhans cell histiocytosis.