{"0": "Abnormal activity of mitochondrial respiratory chain", "1": "Muscle abnormality related to mitochondrial dysfunction", "2": "Mitochondrial myopathy", "3": "Optic disc pallor", "4": "Optic neuropathy", "5": "Polyneuropathy", "6": "Increased csf lactate", "7": "Biliary tract abnormality", "8": "Dementia", "9": "Abnormal mitochondria in muscle tissue", "10": "Proximal tubulopathy", "11": "Abnormality of the mitochondrion", "12": "Sensorimotor neuropathy", "13": "Corneal opacity", "14": "Abnormal social behavior", "15": "Abnormal visual electrophysiology", "16": "Increased serum lactate", "17": "Abnormal biliary tract morphology", "18": "Decreased activity of mitochondrial complex i", "19": "Poor head control", "20": "Abnormal csf metabolite level", "21": "Abnormal choroid morphology", "22": "Abnormal chorioretinal morphology", "23": "Erythema", "24": "Bulbar signs", "25": "Peripheral axonal neuropathy", "26": "Areflexia of lower limbs", "27": "Progressive visual loss", "28": "Ragged red muscle fibers", "29": "Abnormal urine protein level", "30": "Decreased absent ankle reflexes", "31": "Abnormal brainstem mri signal intensity", "32": "Hypertrophic cardiomyopathy", "33": "Delusions", "34": "Visual loss", "35": "Abnormal circulating lipid concentration", "36": "Mental deterioration", "37": "Focal t2 hyperintense brainstem lesion", "38": "Elevated pulmonary artery pressure", "39": "Poor eye contact", "40": "Abnormal glycosylation", "41": "Abnormality of the optic nerve", "42": "Retinopathy", "43": "Reduced visual acuity", "44": "Fluctuations in consciousness", "45": "Abnormality of the cerebrospinal fluid", "46": "Renal tubular dysfunction", "47": "Emg neuropathic changes", "48": "Abnormality of coordination", "49": "Blindness"}