r(20)

Epidemiology and Etiology:

·

Common sites:

·

Gross features:

·

Histologic features:

·

Immunophenotype:

Marker:

Sensitivity:

Specificity:

Molecular features:

·

Other features:

· Characteristic epilepsy

· EEG – characteristic trains of theta waves

· Long runs of epileptiform activity on the EEG in the non-seizing state

· +/- confusion or diminished consciousness

References:

· Gardner RJM, Sutherland GR. Chromosome Abnormalities and Genetic Counseling. 2nd ed. Oxford University Press, USA; 1996.