Cerebral spinal fluid (CSF) leak siu_stethescope_thick Appointment siu_people_icon Providers siu_building_4_columns Locations siu_research_microscope Research Overview Cerebral spinal fluid leak results when the fluid around the brain (called cerebral spinal fluid) leaks through a hold through the skull bone. Care team Profiles Kody Bolk, MD Assistant Professor (ENT) Otolaryngology- Head and Neck Surgery Profiles Mitchell Heuermann, MD Assistant Professor (ENT) Otolaryngology- Head and Neck Surgery Profiles Dana Crosby, MD, MPH Residency Program Director, Chair and Professor (ENT) Otolaryngology- Head and Neck Surgery Clinical trials You can be the future of medicineAt SIU Medicine, our physicians and scientists conduct clinical trials and research studies with the aim of translating findings into new, more effective treatments.