By: Kate M. O’Rourke From: medscape.com Extending the lifespans of patients with breast cancer with novel therapeutic interventions comes with a downside: It has made patients more susceptible to leptomeningeal carcinomatosis (LC), an increasingly prevalent secondary disease. Estimated to occur in up to 16% of patients with breast cancer, LC carries severe consequences. “Leptomeningeal metastases are a catastrophic complication of …