Quadricuspid pulmonary valve is a rare finding which is usually discovered post mortem (Hudson, 1965). Its incidence is variously reported from 1 case in 20,000 necropsies (Simonds, 1923) to 5 cases in 5000 necropsies (Dagnini, 1930). Most other reports suggest, however, that the latter figure is the more accurate (Simpson, 1898; Thilo, 1909; de Vries, 1918; Houck, 1929). In reviewing the subje...