Solitary fibrous tumour (myofibroblastoma) of the breast

Abstract
Three new cases of the spindle cell tumour of the breast, usually termed myofibroblastoma, are reported. The histology and the immunological profile (expression of vimentin, CD34 antigen and of muscular markers) appear similar to those of solitary fibrous tumours recently described in various sites. It is proposed to include these mammary lesions into the group of solitary fibrous tumours and to regard breast as an additional site of origin.