A splicing mutation of the HMGA2 gene is associated with Silver-Russell syndrome phenotype.

Silver-Russell syndrome (SRS) is a heterogeneous disorder characterized by intrauterine and post-natal growth retardation, dysmorphic facial features and body asymmetry. About 50% of the patients carry (epi)genetic alterations involving chromosomes 7 or 11.The high proportion of patients with unidentified molecular etiology suggests the involvement of other genes.

Refinement of genotype-phenotype correlation in 18 patients carrying a 1q24q25 deletion.

Interstitial deletion 1q24q25 is a rare rearrangement associated with intellectual disability, growth retardation, abnormal extremities and facial dysmorphism. In this study, we describe the largest series reported to date, including 18 patients (4M/14F) aged from 2 days to 67 years and comprising two familial cases. The patients presented with a characteristic phenotype including mild to moderate intellectual disability (100%), intrauterine (92%) and postnatal (94%) growth retardation, microcephaly (77%), short hands and feet (83%), brachydactyly (70%), fifth finger clinodactyly (78%) and facial dysmorphism with a bulbous nose (72%), abnormal ears (67%) and micrognathia (56%).

Pure 16q21q22.1 deletion in a complex rearrangement possibly caused by a chromothripsis event.

Background: Partial monosomies of chromosome 16q are rare and overlapping effects from complex chromosomal rearrangements often hamper genotype-phenotype correlations for such imbalances. Here, we report the clinical features of an isolated partial monosomy 16q21q22.1 in a boy with a complex de novo rearrangement possibly resulting from a chromothripsis event.

Terminal osseous dysplasia with pigmentary defects: clinical description of a new family.

Terminal osseous dysplasia with pigmentary defects is an extremely rare condition characterized by the triad of pigmentary anomalies of the skin, skeletal abnormalities of the limbs and recurring digital fibromatosis of childhood, with considerable interfamilial and intrafamilial variability of expression. It has recently been added to the small group of X-linked dominant disorder with prenatal male lethality on the basis of a four-generation pedigree in which only females were affected, male progeny was decreased and the number of spontaneous abortions was increased. In this clinical report, we describe a 2-year-old girl with full expression of the syndrome including skin defects, skeletal anomalies and recurrent fibromatosis of fingers and toes and her mother who presents with only multiple hypertrophic oral frenula.