Many studies have suggested that CA125 can also be expressed at high levels in other types of cancers, such as breast cancer [10,11], mesotheliomas [12,13], non-Hodgkin’s lymphoma [14,15], and leukaemia [16], as well as leiomyomas and leiomyosarcomas of gastrointestinal origin [17]. This evidence concerns the gene MUC16 and breast cancer.