Duplication of 5q15-q23.2: case report and literature review.

BACKGROUND: Pure partial trisomy of chromosome 5q is rare and cases have ranged over the entire region, making it difficult to describe a good phenotypic correlation to the cytogenetic duplication. CASE: We present a 4.5-year-old girl with a de novo direct duplication of chromosome 5q15-q23.2. She has moderate developmental delay with lack of speech, microcephaly, and subtle dysmorphic features including prominent forehead, bulbous nose, epicanthic folds, protruding tongue, and slightly posteriorly-rotated ears. CONCLUSIONS: A comparison is made with other similar duplication cases reported in the literature and a general description of a proximal 5q duplication phenotype is given, with lack of speech as the principal feature.