“…I n a careful search of the literature we can only find reference to 66 cases, in some of which details are scanty or absent. (Bonnet, 1934;aparvier, 1934;Trillat, 1934;Mayer, 1934;Sheldon, 1936;Fournier and Estienny, 1936;Perez and Tallaferro, 1937;Schebat and Laffargue, 1938;Motta, 1938;Traina Rao, 1939;Gepfert, 1939: Acken, 1940Ebergenyi, 1940;Burkons, 1941; Grusetz and Tisdall, 1942;Erbsltih, 1942;James, 1944;Beacham and Varino, 1945;Duckering, 1946;Dupmann, 1948; Lawrence, Nevertheless we have been able to gain sufficient information from the majority of these reports to enable us to make some assessment of the aetiological factors concerned in rupture, and some details of value in early diagnosis and treatment. Two further cases of rupture of the lower segment scar are reported, from Saint Mary's Hospitals, Manchester.…”