{"0": "Muscle abnormality related to mitochondrial dysfunction", "1": "Abnormal activity of mitochondrial respiratory chain", "2": "Increased csf lactate", "3": "Ragged red muscle fibers", "4": "Abnormal csf metabolite level", "5": "Sensory neuropathy", "6": "Mitochondrial myopathy", "7": "Morphological abnormality of the pyramidal tract", "8": "Left ventricular hypertrophy", "9": "Sensorimotor neuropathy", "10": "Horizontal nystagmus", "11": "Optic neuropathy", "12": "Peripheral axonal neuropathy", "13": "Abnormal chorioretinal morphology", "14": "Abnormal choroid morphology", "15": "Tetraplegia tetraparesis", "16": "Decreased activity of mitochondrial complex i", "17": "Abnormal brainstem mri signal intensity", "18": "Visual field defect", "19": "Abnormal peripheral myelination", "20": "Elevated pulmonary artery pressure", "21": "Optic disc pallor", "22": "Exercise intolerance", "23": "Peripheral demyelination", "24": "Areflexia of lower limbs", "25": "Spastic paraplegia", "26": "Polyneuropathy", "27": "Global brain atrophy", "28": "Abnormality of fontanelles", "29": "Abnormality of pulmonary circulation", "30": "Abnormal mitochondria in muscle tissue", "31": "Poor eye contact", "32": "Disproportionate short stature", "33": "Central scotoma", "34": "Pigmentary retinopathy", "35": "Muscle stiffness", "36": "Ventricular hypertrophy", "37": "Abnormal left ventricle morphology", "38": "Paraplegia", "39": "Spastic gait", "40": "Bulbar signs", "41": "Proximal tubulopathy", "42": "Progressive spastic paraplegia", "43": "Toe walking", "44": "Scotoma", "45": "Abnormal biliary tract morphology", "46": "Peripheral axonal degeneration", "47": "Hypopigmented skin patches", "48": "Posterior embryotoxon", "49": "Abnormal epiphyseal ossification"}