“…Thus, it is difficult to determine when the congenital nature of the condition was appreciated first. According to Cornaz [1852], the first congenital case may have been reported by Ferrin in 1740; however, the familial nature of the condition was not recognized until 1894 [Nimier and Despagnet, 18941. Our review of the literature identified only 133 familial cases in 34 families, and 50 isolated cases [Cornaz, 1852;Schweigger, 1878;Nimier and Despagnet, 1894;Ischreyt, 1898;Koller, 1899;Pokrovski, 1914;DeRosa, 1927;Drouin, 1939;Braley, 1955;Fox, 1962;Falls and Kertesz, 1964;Deutsch, 1969;Robinow et al, 1970;Hoover and Kelly, 1971;Mustonen, 1972;Shammas et al, 1976;Jester, 1977;Holmes et al, 1978;Mendoza, 1978;Friday and Hiles, 19781. Many of the latter probably represent fresh mutations but some may have been unrecognized familial cases.…”