Hemorrhoidal disease, pathology of the tissue lining the anal canal, affects approximately 10 million individuals in the US. Author Jean H. Ashburn, MD, of Wake Forest University School of Medicine and JAMA Senior Editor Karen E. Lasser, MD, MPH, discuss the current evidence on the epidemiology, pathophysiology, diagnosis, and treatment of hemorrhoidal disease. Related Content:

• Hemorrhoidal Disease

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JAMA Editors' Summary