A spontaneous growth of tissue which forms an abnormal mass is
called a tumor. A tumor that is noninvasive and noncancerous is
referred to as a benign tumor.
Review Date: 02/20/2011
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of
General Medicine, Department of Medicine, University of Washington
School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical
Director, A.D.A.M., Inc.
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)