{"0": "Abnormal activity of mitochondrial respiratory chain", "1": "Muscle abnormality related to mitochondrial dysfunction", "2": "Optic disc pallor", "3": "Mitochondrial myopathy", "4": "Abnormality of head blood vessel", "5": "Abnormal brainstem mri signal intensity", "6": "Decreased activity of mitochondrial complex i", "7": "Increased csf lactate", "8": "Dementia", "9": "Abnormal mitochondria in muscle tissue", "10": "Abnormal retinal artery morphology", "11": "Optic neuropathy", "12": "Abnormality of the mitochondrion", "13": "Sensorimotor neuropathy", "14": "Proximal tubulopathy", "15": "Abnormal csf metabolite level", "16": "Abnormal circulating lipid concentration", "17": "Abnormality of hepatobiliary system physiology", "18": "Left ventricular hypertrophy", "19": "Fetal distress", "20": "Mental deterioration", "21": "Impaired vibratory sensation", "22": "Focal t2 hyperintense brainstem lesion", "23": "Horizontal nystagmus", "24": "Respiratory distress", "25": "Delusions", "26": "Impaired proprioception", "27": "Hepatic failure", "28": "Bulbar signs", "29": "Poor eye contact", "30": "Poor head control", "31": "Myoclonus", "32": "Retinopathy", "33": "Paroxysmal involuntary eye movements", "34": "Blindness", "35": "Abnormality of the vasculature of the eye", "36": "Abnormal social behavior", "37": "Limb ataxia", "38": "Ragged red muscle fibers", "39": "Lower limb spasticity", "40": "Progressive neurologic deterioration", "41": "Increased serum pyruvate", "42": "Elevated pulmonary artery pressure", "43": "Increased bone mineral density", "44": "Abnormal retinal vascular morphology", "45": "Abnormal circulating cholesterol concentration", "46": "Abnormality of pulmonary circulation", "47": "Ventricular hypertrophy", "48": "Renal tubular dysfunction", "49": "Abnormal saccadic eye movements"}