eng Science and Education Publishing American Journal of Medical Case Reports 2374-216X 2020-05-18 8 8 253 256 10.12691/ajmcr-8-8-11 AJMCR20208811 article Pramod Theetha Kariyanna 1 Jonathan Francois 1 Amog Jayarangaiah 2 Yuvraj Singh Chowdhury 2 Richard Grodman 3 Moro O. Salifu 3 Isabel M. McFarlane Isabel.McFarlane@downstate.edu 3 Department of Internal Medicine, State University of New York, Downstate Medical Center, Brooklyn NY 11203, USA Trinity School of Medicine, Ratho Mill, Ribishi, St. Vincent and Grenadines Richmond University Medical Center, Department of Cardiology, Staten Island, New York, United States Quadricuspid aortic valve (QAV) is a rare congenital valvular abnormality with less than 200 cases reported to date. The first QAV was reported in 1862 by Balington. Clinical manifestations of patients with a QAV depend on the functional status of the QAV and the associated cardiac disorders. Most QAV are asymptomatic and are incidentally found. Severe aortic regurgitation and/or stenosis can develop overtime, requiring aortic valve replacement or repair. Transesophageal echocardiography is the preferred modality to diagnose QAV. We present a case of QAV which was incidentally diagnosed in a 43-year-old woman who presented with gastroenteritis. http://pubs.sciepub.com/ajmcr/8/8/11/ajmcr-8-8-11.pdf Quadricuspid aortic valve congenital variant of aortic valve Hurwitz and Robert¡¯s classification