An unusual case of an enlarging mass on a screening mammogram: a case report and review of the radiology and current literature.

We report the case of a woman who was recalled after screening because an opacity seen on her previous screening mammogram had changed in appearance. The new features were of a circumscribed soft-tissue opacity with some lobulation. Ultrasound showed an oval mass which was slightly hypoechoic compared to the surrounding fatty parenchyma and contained small focal anechoic areas. The lesion was biopsied and found to be a cavernous haemangioma. Haemangioma of the breast is a rare cause of a well-circumscribed soft-tissue mass on a mammogram.