Metastases to the breast from rhabdomyosarcoma: appearances on MRI

The authors report a case of blood-borne bilateral metastatic breast diseas e of alveolar rhabdomyosarcoma (RMS) in a 21-year-old patient. The possibil ities of mammography, ultrasound, and MRI in the early detection of breast metastases and their appearance on these modalities are discussed. Whereas mammography rendered no additional information due to dense breast parenchy ma and ultrasound showed only a solitary tumor without definite criteria of malignancy, multifocal bilateral spread was verified with MRI and early ri ng-like enhancement suggested malignancy. Therefore, we conclude that MRI m ay provide useful information in evaluating patients with sarcomas, even wh en there is no clinical evidence for metastatic disease of the breast.