Describing something that has an unknown or hidden origin, especially a medical condition whose cause cannot be identified even after thorough investigation.
From Greek 'kryptos' (hidden) and 'genic' (producing or caused by), this medical term emerged in the 19th century to describe diseases with mysterious causes. As diagnostic methods improved, the term persisted for cases that still eluded explanation.
Doctors use this word when they're stumped—it's like saying 'we know something is definitely wrong, but we have no idea why it started.' Many epilepsy cases are cryptogenic, meaning patients have seizures without a detectable brain abnormality.
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