Genetic Testing Company | The DNA Diagnostic Experts | GeneDx

In observance of the holidays, GeneDx will be closed for business on Thursday, December 25, 2014 and on Thursday, January 1, 2015. We will be unable to receive and process specimens. FedEx and UPS will also not be in operation. Except for the aforementioned dates, GeneDx will operate on our normal schedule (Monday-Saturday), including December 24th and December 31st.  If you have any questions or inquiries, please call us at 301-519-2100 or email us at

Ichthyin(NIPAL4) Gene Sequencing



NIPAL4 (Ichthyin)
Clinical Utility:
  • Confirmation of the clinical diagnosis in any child born with a collodion membrane in whom a TGM1 mutation has been ruled out
  • Confirmation of the clinical diagnosis in any individual with non-bullous congenital ichthyosiform erythroderma
  • Identification of at-risk family members
  • Prenatal diagnosis
Lab Method:
Capillary Sequencing


Test Code:
Turnaround Time:
4-5 weeks
Preferred Specimen:
2-5 mL Blood - Lavender Top Tube


CPT Codes:
New York Approved:
ABN Required:
Billing Information:
View Billing Policy
ICD Codes:
  • 757.39: Other Accessory skin tags, congenital, Congenital scar, Epidermolysis bullosa, Keratoderma (congenital)
  • 757.1: Ichthyosis congenita, Congenital ichthyosis, Harlequin fetus, Ichthyosiform erythroderma
* For price inquiries please email


  1. Lobard et al. Lipoxygenase-3 (ALOXE3) and 12B-lipoxygenase (ALOX12B) are mutated in non-bullous congenital ichthyosiform erythroderma (NCIE) linked to chromosome 17p13.1. Hum Mol Genet 11:107-113, 2002
  2. Eckl et al. Mutation spectrum and functional analysis of epidermis-type lioxygenases in patients with autosomal recessive congenital ichthyosis. Hum Mutat. 2005 Oct;26(4):351-61
  3. Lefevre et al. Mutations in ichthyin a new gene on chromosome 5q33, in a new form of autosomal recessive congenital ichthyosis. Hum Mol Genet 13:2473-2482, 2004
  4. Dahlqvist et al., Congenital ichthyosis: Mutations in ichthyin associated with specific structural abnormalities in the granular layer of epidermis. J Med Genet 44: 615-620, 2007

Back To Top