Clinical characterization and genetic analysis of a patient with Xeroderma pigmentosum in conjunct with basal cell carcinoma and melanoma due to variants of XPC gene.
10.3760/cma.j.cn511374-20250731-00469
- Author:
Yixing CHANG
1
,
2
;
Xiaoning ZHANG
;
Rui WANG
;
Qiumei WANG
;
Zhenghao LIU
Author Information
1. Xinxiang Central Hospital, Xinxiang, Henan 453000, China. liu17637327204@
2. com.
- Publication Type:English Abstract
- MeSH:
Humans;
Male;
Xeroderma Pigmentosum/genetics*;
Basal Cell Carcinoma/genetics*;
DNA-Binding Proteins/genetics*;
Melanoma/genetics*;
Mutation;
Skin Neoplasms/genetics*;
Middle Aged;
Exome Sequencing;
Pedigree
- From:
Chinese Journal of Medical Genetics
2025;42(11):1381-1386
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To explore the clinical presentation and genetic etiology of a case with Xeroderma pigmentosum in conjunct with basal cell carcinoma and melanoma.
METHODS:A male patient with Xeroderma pigmentosum treated at Xinxiang Central Hospital in October 2022 was selected as study subject. Whole exome sequencing (WES) was carried out. Candidate variants were verified by Sanger sequencing of his family members. This study was approved by the Ethics Committee of the hospital (Ethics No.: 2021-167).
RESULTS:Magnetic resonance imaging showed that the patient has a solid soft tissue mass in the anterior and lower part of his right eyeball and a small nodule on the left nasal wing. Histopathological biopsy showed that the periocular tumor was basal cell carcinoma in conjunct with malignant melanoma, and the nasal wing tumor was basal cell carcinoma. WES and Sanger sequencing revealed that he has harbored compound heterozygous variants of the XPC gene, namely c.2391delT (p.F797Lfs*11) and IVS1+1G>A, which were inherited from his father and mother, respectively. Based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), the variants were rated as likely pathogenic (PVS1+PM2_Supporting+PM3) and pathogenic (PVS1+PM2_Supporting+PM3+PP5), respectively. The c.2391delT variant was unreported previously. Bioinformatic analysis suggests that it could significantly affect the tertiary structure of XPC protein.
CONCLUSION:The c.2391delT(p.F797Lfs*11) and IVS1+1G>A compound heterozygous variants probably underlay the pathogenesis in this patient. The detection of the novel variant has enriched the mutational spectrum of the XPC gene.
