Dr Tang and Dr Ng selected 26 difficult cases presented in the New England Journal of Medicine, including Cushing's syndrome, Creutzfeldt-Jakob disease, encephalitis and cirrhosis.
They then plugged the symptoms of each case into the search engine to come up with a diagnosis.
When these diagnoses were compared with the correct published diagnoses, the researchers found that Google got it right 58 per cent of the time.
They say an online search is likely to be more effective at helping to diagnose conditions with unique symptoms that can be used as search terms
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