Dataset Information

Cole-Carpenter syndrome-1 with a de novo heterozygous deletion in the P4HB gene in a Chinese girl: A case report.

ABSTRACT: RATIONALE:Cole-Carpenter syndrome-1 (CLCRP1) is an independent osteogenesis imperfect (OI)-like disorder that manifests as bone fragility, craniosynostosis, ocular proptosis, hydrocephalus, and distinctive facial features. Only 2 types of mutation sites in the P4HB and CRTAP genes have been reported. PATIENT CONCERNS:A 14-month-old Chinese girl presented with prominent ocular proptosis, frontal bossing, craniosynostosis, plump anterior fontanel, growth retardation, osteopenia, and distinctive facial features that were strikingly similar to those in the original 2 cases. DIAGNOSES:Whole-exome sequencing revealed a novel deletion variation in exons 5 to 8 of the P4HB gene, which was found to be heterozygous using fluorogenic quantitative-polymerase chain reaction. LESSONS:This de novo deletion mutation in exons 5 to 8 of the P4HB gene advances our understanding of CLCRP1, expands the mutation spectrum of P4HB, and diversifies the cases reported for this condition.

SUBMITTER: Ouyang L

PROVIDER: S-EPMC6392654 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Cole-Carpenter syndrome-1 with a de novo heterozygous deletion in the P4HB gene in a Chinese girl: A case report.

Ouyang Lixue L Yang Fan F

Medicine 20171201 52

<h4>Rationale</h4>Cole-Carpenter syndrome-1 (CLCRP1) is an independent osteogenesis imperfect (OI)-like disorder that manifests as bone fragility, craniosynostosis, ocular proptosis, hydrocephalus, and distinctive facial features. Only 2 types of mutation sites in the P4HB and CRTAP genes have been reported.<h4>Patient concerns</h4>A 14-month-old Chinese girl presented with prominent ocular proptosis, frontal bossing, craniosynostosis, plump anterior fontanel, growth retardation, osteopenia, and ...[more]

PMID: 29384951

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Project description:BACKGROUND: Association of melanoma, neural system tumors and germ line mutations at the 9p21 region in the CDKN2A, CDKN2B and CDKN2BAS genes has been reported in a small number of families worldwide and described as a discrete syndrome in melanoma families registered as a rare disease, the melanoma-astrocytoma syndrome. CASE PRESENTATION: We here studied two young patients developing melanoma after radiotherapy for astrocytoma, both reporting lack of family history for melanoma or neural system tumors at genetic counselling. Patient A is a girl treated for anaplastic astrocytoma at 10 years and for multiple melanomas on the scalp associated to dysplastic nevi two years later. Her monozygotic twin sister carried dysplastic nevi and a slow growing, untreated cerebral lesion. Direct sequencing analysis showed no alterations in melanoma susceptibility genes including CDKN2A, CDK4, MC1R and MITF or in TP53. By microsatellite analysis, multiplex ligation-dependent probe amplification, and array comparative genomic hybridization a deletion including the CDKN2A, CDKN2B and CDKN2BAS gene cluster was detected in both twin sisters, encompassing a large region at 9p21.3 and occurring de novo after the loss of one paternal allele.Patient B is a boy of 7 years when treated for astrocytoma then developing melanoma associated to congenital nevi on the head 10 years later: sequencing and multiplex ligation-dependent probe amplification revealed a normal profile of the CDKN2A/CDKN2B/CDKN2BAS region. Array comparative genomic hybridization confirmed the absence of deletions at 9p21.3 and failed to reveal known pathogenic copy number variations. CONCLUSIONS: By comparison with the other germ line deletions at the CDKN2A, CDKN2B and CDKN2BAS gene cluster reported in melanoma susceptible families, the deletion detected in the two sisters is peculiar for its de novo origin and for its extension, as it represents the largest constitutive deletion at 9p21.3 region identified so far.In addition, the two studied cases add to other evidence indicating association of melanoma with exposure to ionizing radiation and with second neoplasm after childhood cancer. Melanoma should be considered in the monitoring of pigmented lesions in young cancer patients.

Dataset Information

Cole-Carpenter syndrome-1 with a de novo heterozygous deletion in the P4HB gene in a Chinese girl: A case report.

Publications

Cole-Carpenter syndrome-1 with a de novo heterozygous deletion in the P4HB gene in a Chinese girl: A case report.

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