Ring chromosome 20 syndrome with non-convulsive epileptic status phenotype.
The ring chromosome was described by Atkins in 1972, this chromosomal arrangement has an estimated frequency of 1 in 25,000-60,000 births, generally it is de novo with 1% being heritable. The clinical picture of this genetic condition is characterized mainly by the presence of refractory epilepsy, intellectual disability, and behavioral disorders.