Leptomeningeal metastasis is a serious complication of systemic cancer commonly occurring in later disease stages which affects approximately 10% of patients with solid tumors. The risk is highest for patients with lung cancer, melanoma and breast cancer. Survival at one year is in the range of 10%. Cerebrospinal fluid analysis and magnetic resonance imaging are the most important diagnostic measures. Treatment recommendations vary by primary tumor and pattern of disease, that is, e.g., the absence or presence of concurrent systemic or solid brain metastasis. To explore the current practice of diagnosing and treating leptomeningeal metastasis across Europe, a web-based survey was sent to members of the European Association of Neuro-Oncology (EANO) and the Brain Tumor Group of the European Organisation for Research and Treatment of Cancer (EORTC) in April 2016 which contains 24 questions on current practice patterns as well as 8 case presentations. The results of this survey will be presented for the first time. They shall serve as the basis for treatment recommendations for this complication of systemic cancer that reflects current knowledge as well as current practice.