Ring chromosome 17

Alternate names

Chromosome 17 ring; Ring 17; R17

Definition

Ring chromosome 17 syndrome is a rare chromosomal anomaly syndrome, resulting from partial deletion of chromosome 17, characterized by highly variable manifestations, ranging from a severe phenotype which presents with lissencephaly and severe intellectual disability to a milder phenotype that includes short stature, microcephaly, intellectual disability, seizures (that may be pharmacoresistant), café-au-lait spots, retinal flecks and minor facial dysmorphism, depending on the presence or absence of the Miller-Dieker critical region.

NIH genetic and rare disease info

• NIH info on Ring chromosome 17

Ring chromosome 17 is a rare disease.