Bone metastases from breast cancer: value of CT bone windows.

A pilot study was organized to compare the utility of scintigraphy, radiographic bone surveys, and conventional CT bone windows (CTBWs) in judging therapeutic response of bone lesions in patients with metastatic breast carcinoma. Twenty-six patients with stage IV disease and documented bone metastases were evaluated over a 2 year period. Discordance in the assessment of therapeutic response was greatest (56% discordance) between bone scans (BSs) and conventional CTBWs. In 77% of the discordant observations, the assessment by conventional CTBWs agreed with the patients' clinical response to therapy. Our preliminary results suggest that posttherapy review of conventional CTBWs provides useful clinical information about therapeutic response and exceeds the contribution of BSs in this regard.