4.5 Article

Brazilian XP-E siblings carrying a novel DDB2 variant developed early-onset melanoma: a case report

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BMC MEDICAL GENOMICS
卷 16, 期 1, 页码 -

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BMC
DOI: 10.1186/s12920-023-01622-8

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Case Report; Xeroderma Pigmentosum; XP-E; Melanoma

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This article reports two XP-E patients from a Brazilian consanguineous family carrying a novel missense variant in the DDB2 gene, leading to early-onset and severe phenotype skin cancer. The case highlights the importance of sun protection measures in XP-E patients and discusses the detrimental impact of the COVID-19 pandemic on cancer diagnosis.
BackgroundXeroderma pigmentosum group E (XP-E) is one of the least common forms of XP, a rare syndrome where patients are prone to develop skin cancer in exposed sunlight areas. XP-E patients are generally not diagnosed until they are adults due to the mild phenotype. Case presentation: two XP-E siblings, female, 23 years, and male, 25 years, from a Brazilian consanguineous family carrying the novel missense pathogenic variant in DDB2 gene, NM_000107.3:c.1027G > C, associated with skin cancer early-onset and severe phenotype, as nodular melanoma in the cornea and in the ear. Conclusion: The assessment of genomic variant pathogenicity was a challenge since this family belongs to an underrepresented population in genomic databases. Given the scarcity of literature documenting XP-E cases and the challenges encountered in achieving an early diagnosis, this report emphasizes the imperative of sun protection measures in XP-E patients. Additionally, it highlights the detrimental impact of the COVID-19 pandemic on cancer diagnosis, leading to the manifestation of a severe phenotype in affected individuals.

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