A brain tumor is a benign or malignant growth in the brain. A malignant brain tumor may be further classified as either a primary tumor (arises in brain tissue) or metastatic (a cancer that has spread, or metastasized, to the brain tissue from elsewhere in the body). Brain tumors can be found in patients of any age. They can begin in any part of the brain. In addition, a brain tumor may be confined to a single area or infiltrate several areas. Brain tumors also vary in aggressiveness, or speed of growth. Due to these differences, the treatment of brain tumors must be uniquely tailored to each patient. The location of the tumor and the clinical diagnosis (as determined by diagnostic imaging tests), as well as the patient's age and general condition, are all important treatment considerations. Lahey's Brain Tumor Clinic is based on a multidisciplinary approach to the evaluation and treatment of patients with benign and malignant brain tumors. Brain Tumor Clinic patients are cared for by a neurosurgeon, neuro-oncologist, radiation oncologist, nurse practitioner and a social worker. Our team of experts work together to provide each patient with comprehensive, specially individualized care. Patients are treated in a holistic manner to optimize their medical care and to meet their emotional and functional needs. Brain Tumor Clinic is held weekly on Fridays. In addition, members of the Brain Tumor Clinic team hold a weekly brain tumor conference, during which they collaborate with neuroradiologists and neuropathologists to make the most accurate diagnoses and to develop a customized treatment plan for each patient.