In a recent study by Dalgorf et al [13], 9 females with vestibular schwannoma were studied for expression of estrogen, progesterone and vascular endothelial growth factor (VEGF) by immunohistochemical studies using monoclonal mouse antibodies and their result for estrogen and progesterone receptor was unequivocally negative in all the nine cases while VEGF was positive in eight out of nine cases. This evidence concerns the gene PGR and Vestibular schwannoma.