Breast metastases to bones of the extremities: simultaneous involvement of all four limbs.

Metastases to bones of the hands and feet are unusual, and simultaneous metastases to the bones of more than one extremity in a given patient is an extremely rare occurrence with only five previous case reports. In each of these cases the bones of two extremities were affected. A case is presented where the bones of both hands and both feet exhibited bone metastases. A second case with foot bone metastases is recorded. In both cases the primary tumour was a breast carcinoma. Theories of causation of such metastases are discussed.