Abstract: 【Abstract】 Objective To report a newborn with Goltz syndrome and a de novo mutation in the PORCN gene. Methods Clinical data collected from the newborn with Goltz syndrome were retrospectively analyzed. Peripheral venous blood samples were obtained from a newborn and her parents, genomic DNA was extracted, whole-exome sequencing was performed to screen disease-causing genes in the patient, and Sanger sequencing was conducted to verify the mutant genes. Results The 7-hour-old female newborn presented with scalp defects, multiple epidermal defects on the face, inner sides of both knee joints, deformity of the left auricle, syndactyly of the middle and ring fingers of the right hand as well as the great and second toes of the right foot, and lobster-claw deformity of the left foot. Genetic testing showed that a fragment TCCTTCCA was inserted at position 514-521 in exon 4 of the PORCN gene of the patient （c.514_521dupTCCTTCCA）, resulting in the substitution of serine by proline at amino acid position 175 （p.S175Pfs*14）, followed by the translation termination at the 14th codon. This heterozygous mutation was not found in his parents. The patient was diagnosed with Goltz syndrome. Conclusion There are various phenotypes of Goltz syndrome, and a confirmed diagnosis of Goltz syndrome can be made based on PORCN gene mutations and clinical manifestations. The heterozygous mutation c.514_521dupTCCTTCCA is a novel mutation.

Key words: Focal dermal hypoplasia, Infant, newborn, DNA mutational analysis, Goltz syndrome, PORCN gene