cryptogenic

/ˌkrɪptəˈdʒɛnɪk/
adjective
  1. Of unknown or uncertain origin or cause, especially in medicine or science.
    • Scientists studied the cryptogenic disease to find out why it appeared in the population.
    • The patient was diagnosed with cryptogenic epilepsy, meaning the cause could not be identified.
    • The cryptogenic liver condition puzzled doctors for years.
Antonyms
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