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1 patient data entry collated from reference Gago et al, 2006.

allele 1allele 2
Clinical representationSymptomsAge groupPatient ageAge of onsetAge of death
Man presented at age 39 progressive bilateral ptosis, unsteadiness gait and muscle weakness with difficulty in dressing and lifting objects. Three years later he noticed dysphagia and diplopia and sought medical advice. Neurological examination revealed droopy eyes which worsened after repeated eye movements and external ophthalmoparesis with diplopia on horizontal gaze. The patient also presented fluctuant dysarthria and dysphagia which worsened at the end of the day. There was distal limb muscles weakness with reduced deep tendon reflexes. Perception of vibration and position was absent below the iliac crests. Touch, pain and temperature senses were preserved. Signs of cerebellar dysfunction were also evident. Romberg sign was positive. multiple mtDNA deletions in muscle Summary: Sensory ataxia with neuropathy, dysarthria and ophthalmoparesis represent the clinical triad of SANDO
-movement disorder (ataxia)
-sensory ataxia
-muscle weakness

1-5 pathogenic cluster assignment of mutations. Mutations displayed without a superscript number are outside of the assigned pathogenic clusters. See cluster definitions for details.

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