The value of serial bone scanning in operable breast cancer.

The value of initial and serial isotope bone scans was assessed in 685 patients with operable primary breast cancer. Nineteen (2.8 per cent) patients had a positive initial scan and negative skeletal radiographs; only nine of these developed other evidence of metastatic disease after a mean follow up of 21 months. Five hundred and ten patients had serial scans up to five years after simple mastectomy; 51 (10 per cent) had scan conversion, of whom 37 developed clinical or radiological confirmation of recurrent disease at a mean follow-up of 13 months. Compared with clinical or radiological methods for the detection of first metastases serial bone scans gave a mean lead time of five months in 15 patients and no lead time in the remaining 22 patients. Twelve of forty-five patients with radiologically proven bone metastases had negative scans. Neither initial or serial bone scanning is clinically useful or economically viable as a routine screening or follow-up procedure for patients with operable breast cancer.