[Phenotype of a ring-chromosome 6 carrier. Clinical and cytogenetic study]

A ring 6 chromosome was detected in a 18 months old boy. The patient was a dwarf with psychomotor retardation, morphological anomalies i.e. microcephaly, bird head shaped facies with large ears, arched palate and micrognathia. A survey of 9 others cases collected in the medical literature permit to propose a specific phenotype for this chromosomal abnormality.