A boy with 13.34-Mb interstitial deletion of chromosome 4p15: A new case report and review of the literature

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Rationale:To date, >40 cases have been described with interstitial deletions involving the 4p15 region.Patient concerns and diagnosis:We report a case of a 3-year-old boy with an interstitial de novo deletion of approximately 13.34 Mb in 4p15.1–15.31 having mild developmental delay and multiple minor congenital abnormalities.Lessons:This case presents a clinical manifestation that is similar but not identical to other reported cases. In this report, we have provided a detailed description of a 3-year-old patient with an interstitial 4p deletion and mildly affected phenotype. We discuss the possible involvement of SLIT2, KCNIP4, and LGI2 in cortical development and RBPJ in skeletal abnormalities.

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