Sterilisation Operations Mr. Warren asked the Secretary of State for Social Services what records are kept of sterilisation operations performed in connection with the SOTOS syndrome; and how many of these operations have been carried out in each of the last five years. Dr. Owen Records would be kept on the individual medical histories of any patients there may be in this category; no information is available on any number, if any, of sterilisation operations performed on patients suffering from this very rare and only recently reported conditions.