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Self-Healing Collodion Membrane and Mild Nonbullous Congenital Ichthyosiform Erythroderma Due to 2 Novel Mutations in the ALOX12B Gene
Mandy Harting, MD;
Nicola Brunetti-Pierri, MD;
C. Stanley Chan, MD;
Joslyn Kirby, MD;
Megan K. Dishop, MD;
Gabriele Richard, MD;
Fernando Scaglia, MD;
Albert C. Yan, MD;
Moise L. Levy, MD
Arch Dermatol. 2008;144(3):351-356.
Background Collodion phenotype is a term applied to the condition affecting a newborn involving a parchmentlike membrane covering the whole body surface (collodion membrane). This presentation is common to several different forms of autosomal recessive congenital ichthyoses, including nonbullous congenital ichthyosiform erythroderma (NCIE), lamellar ichthyosis (LI), and harlequin ichthyosis (HI). Recent years have seen considerable advances in our understanding of the molecular basis of autosomal recessive forms of congenital ichthyosis. Several genetic loci have been identified for LI and NCIE.
Observations We describe the clinical and molecular features of 2 cases of self-healing newborns of collodion phenotype developing mild NCIE. A dramatic improvement of the skin was observed in the first few weeks after birth in both cases. The molecular analysis of the ALOX12B gene demonstrated that both patients were compound heterozygous for previously unreported mutations.
Conclusions Both patients were compound heterozygous for novel ALOX12B mutations, underscoring the concept that mutations in at least 2 different genes, ALOX12B and TGM1, may result in this unusual clinical phenotype.
Author Affiliations: Departments of Dermatology (Drs Harting, Chan, and Levy), Genetics (Drs Brunetti-Pierri and Scaglia), Pathology (Dr Dishop), and Pediatrics (Dr Levy), Texas Children's Hospital, Baylor College of Medicine, Houston; Department of Molecular and Human Genetics, Baylor College of Medicine (Drs Brunetti-Pierri and Scaglia); The Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia (Drs Kirby and Yan); and GeneDx Inc, Gaithersburg, Maryland (Dr Richard). Dr Levy is now with ’Specially for Children, Austin, Texas.
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