Anastrozole-induced remission of diaphragmatic paralysis from metastatic breast cancer treated with multiple prior therapies.

We describe a woman with metastatic breast cancer treated with multiple rounds of prior cytotoxic and endocrine therapies, who presented with ipsilateral diaphragmatic paralysis. The use of anastrozole, a highly selective nonsteroidal aromatase inhibitor (1 mg daily), successfully induced remission of metastatic tumors in our patient, who is partially recovering from diaphragmatic paralysis.