[A case of atypical bone metastasis from breast carcinoma]

Clinical and radiographical data are presented for a case of suspected pathological fracture of the right ulna in a 66-yr-old women mastectomised two years previously. Multiple skeletal lesions were noted, often morphologically different from those usually observed in metastasis of breast cancer, with a fibrous and cystic appearance reminiscent of von Recklinhausen's disease. However, indisputable serohumoral data, the histological picture on biopsy, and repair of bone as a result of immuno-antiblastic management showed that true metastases were involved. The radiographical picture and the response to therapy make it clear that atypical bone pictures must be carefully watched, since metastasis from breast cancer may be responsible for special morphological and structural features requiring close differential investigation.