A clinically heterogeneous progressive condition characterized by a combination of proximal neurogenic muscle weakness, sensory-motor neuropathy, ataxia, and pigmentary retinopathy. The disease is Monarch Disease Ontology id MONDO_0010794 (NARP syndrome). Also known as: neurogenic muscle weakness-ataxia-retinitis pigmentosa syndrome, neuropathy-ataxia-retinitis pigmentosa syndrome.