Table 3: Mitochondrial disorders and epilepsy.

Category of disorderSyndrome

Mitochondrial complex deficiencies(i) Complex I deficiency
(ii) Complex II deficiency
(iii) Complex III deficiency
(iv) Complex IV deficiency
(v) Complex V deficiency

Mitochondrial DNA disorders (i) mtDNA depletion syndromes
 (a) POLG1 disease
  (1) Alpers-Huttenlocher disease
  (2) Childhood onset epilepsia partialis continua (EPC)
  (3) Myoclonic epilepsy myopathy sensory ataxia (MEMSA)
(ii) mtDNA deletion syndromes
 (a) Kearns-Sayre syndrome (KSS)
 (b) Chronic progressive external ophthalmoplegia (CPEO)
(iii) Myoclonic epilepsy with ragged-red fibers (MERRF)
(iv) Myoclonic epilepsy, lactic acidosis, and stroke (MELAS)

Other associated syndromesLeigh syndrome