A Feasibility Safety Study of Benign Centrally-Located Intracranial Tumors in Pediatric and Young Adult Subjects

Inclusion Criteria: * Subjects with benign (WHO grade I) centrally located intracranial tumors which require clinical intervention and are known to carry minimal hemorrhage risk * Minimum head circumference will be 49cm * Skull Density Ratio (SDR) should be ≥0.35 * Subjects should be on a stable dose of all condition-related medications for 30 days prior to study entry as determine by medical records * Subjects and/or parent(s)/legal representative can provide accurate seizure diary log for the 30 days prior to FUS treatment and for the duration of the study Exclusion Criteria: * Subjects with unstable cardiac status that would increase anesthetic risk including * Subjects exhibiting any behavior(s) consistent with ethanol or substance abuse as defined by the criteria outlined in the DSM-IV * Subjects who are taking human growth hormone (hGH), also known as somatotropin * Subjects with standard contraindications for MR imaging such as non-MRI compatible implanted metallic devices including vagus nerve stimulator, responsive neurostimulator, cardiac pacemakers, non-metallic shunts, size limitations, etc. * Known intolerance or allergies to the MRI contrast agent (e.g. Gadolinium or Magnevist) or sedative medications * Severely impaired renal function (estimated glomerular filtration rate \<70% of normal GFR for age) or receiving dialysis * Any history of clinically significant abnormal bleeding and/or coagulopathy * Receiving anticoagulant (e.g. warfarin) or antiplatelet (e…