A rare chromosomal anomaly syndrome resulting from the partial duplication of the long arm of chromosome 10. Characteristics include mild to moderate developmental delay, postnatal growth retardation, central hypotonia, craniofacial dysmorphism (including microcephaly, prominent forehead, flat, thick ear helices, deep-set, small eyes, epicanthus, upturned nose, bow-shaped mouth, highly arched palate, micrognathia), ocular anomalies (for example iris coloboma, retinal dysplasia, strabismus), long, slender limbs and skeletal and digital anomalies (scoliosis, poly/syndactyly). Additional features reported include cardiac defects (for example septal ventricular defect), anal atresia, and cryptorchidism. [from SNOMEDCT_US]