The authors compared the results of bone scintigraphy and determination of CEA levels in a group consisting of 167 patients suffering from breast cancer with suspect distant metastases. The high agreement (79%) in results of both of examinations increase the diagnostic reliability of distant metastases. In the case of disagreement the bone scanning should be considered as a more sensitive method. The elevated CEA levels at negative or only uncertain bone scintigraphy results most often prove the present of distant metastases outside the skeleton.