It has been found that uterine leiomyosarcomas is more likely to have a loss of WT1 expression, and WT1 is expressed in most uterine leiomyomas, so WT1 may also have a certain value in distinguishing benign and malignant uterine leiomyosarcomas 49, 178. This evidence concerns the gene WT1 and uterine corpus leiomyoma.