Idiopathic is defined as not knowing or being able to identify the cause of a disease.
Sources:
- Tirlapur S. A et al. How do we define the term idiopathic? Curr Opin Obstet Gynecol. 2013 Dec;25(6):468-73. https://pubmed.ncbi.nlm.nih.gov/24121599/
- WebMD. What is the definition of idiopathic? https://www.webmd.com/heart-disease/heart-failure/qa/what-is-the-definition-of-idiopathic (accessed 3. August 2020)