“…[1][2][3][4][5][6][7][8] It is a syndrome characterized by a clinical tetrad of severe, widespread, seborrheic-like erythroderma beginning on the scalp or diaper area, followed by a persistent gastrointestinal disturbance, marked wasting and weight loss, and recurrent staphylococcal and candidal infections. [6][7][8][9][10][11][12][13] Although originally reported in 1908 as a rare, autosomal dominant (AD) trait associated with a defect in yeast opsonization from dysfunctional complement 5 (C5), the "LD" phenotype may occur in infants with a variety of immunodeficiency disorders, such as complement 3 (C3) or complement 4 (C4) dysfunction, severe combined immunodeficiency (SCID), hypogammaglobulinemia, and hyperimmunoglobulinemia E. 2,3,6,14,15 Austrian pediatrician Carl Leiner 7 in his original series during 1908 concluded that LD is a potentially fatal systemic condition that has a genetic link, a correlation with breastfed infants, and characteristic severe gastrointestinal disturbances. Later works confirmed the existence of both a familial and nonfamilial form of LD, but did not substantiate breastfeeding as a consistent finding.…”