It is stated in the 1928 edition of Osler and McCrae's textbook1 that "dissecting aneurysm is uncommon. There were only two cases in sixteen years at the Hopkins' Hospital where aneurysm is exceptionally frequent." Professor Shennan, in a monograph,2 reviewed all the reports in the literature up to 1934 and accepted 297 cases, including his own, as instances of true dissecting aneurysm of the aorta.
In the American literature since 1932 at least 65 cases have been reported. Hamburger and Ferris3 reported 6 cases in which the condition was discovered at autopsy; all 6 cases were observed within the short period of seven months, while in the preceding nine years only 10 cases had come to necropsy at the Cincinnati General Hospital. The incidence noted by other authors4 has been 1 case of dissecting aneurysm in 300 to 500 autopsies. The 4 cases described in this report were observed in
REISINGER JA. DISSECTING ANEURYSM OF THE AORTA. Arch Intern Med (Chic). 1940;65(6):1097-1115. doi:10.1001/archinte.1940.00190120014002