Does confirmatory tumor biopsy alter the management of breast cancer patients with distant metastases?

Does confirmatory tumor biopsy alter the management of breast cancer patients with distant metastases?
C. Simmons, N. Miller, W. Geddie, D. Gianfelice, M. Oldfield, G. Dranitsaris, and M. J. Clemons

Ann Oncol 2009 20: 1499-1504

Link to Journal

This prospective study demonstrates the presence of substantial discordance in receptor status between primary tumor and metastases, which led to altered management in 20% of cases. Tissue confirmation should be considered in patients with clinical or radiological suspicion of metastatic recurrence