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  • Title: New morphological classification of congenital quadricuspid aortic valve and its histopathologic features.
    Author: Cheng CL, Chang HH, Wang WC, Huang PJ, Lin SY.
    Journal: Cardiovasc Pathol; 2018; 35():8-11. PubMed ID: 29729634.
    Abstract:
    We report a 52-year-old male patient who had a quadricuspid aortic valve (QAV) associated with aortic regurgitation (AR) and left ventricular hypertrophy (LVH). A new accessory cusp (ACC) with maximum thickness than other cusps was located between right coronary cusp (RCC) and left coronary cusp (LCC). The histopathological features revealed markedly thickened and distorted cusp architecture with fibrosis and/or myxomatous degeneration in both non-coronary cusp (NCC) and ACC. Two equal sizes for larger cusps (RCC and NCC) and two equal sizes for smaller cusps (LCC and ACC) were obtained. This QAV belonged to type C QAV of Hurwitz's classification, but also suggested as a modified type III of Jagannath's classification or a new type V of Nakamura's classification by locating ACC between RCC and LCC.
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