An insidious disease is any disease that comes on slowly and does not have obvious symptoms at first. The person is not aware of its development.
Taber's Cyclopedic Medical Dictionary. 24th ed. Insidious. Philadelphia, PA: F.A. Davis Company; 2021.
Last reviewed on: 4/27/2023
Reviewed by: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.