Decubitus Myelography for Spinal Extradural Arachnoid Cyst—Better Classified as a Lateral Dural CSF Leak?

From the Department of Radiology (M.D.M., A.G.), The Permanente Medical Group, Kaiser Permanente Medical Center, Santa Clara, California; Department of Radiology and Biomedical Imaging (M.D.M.), University of California, San Francisco, San Francisco, California; Kaiser Permanente Bernard J. Tyson School of Medicine (A.R.Z), Pasadena, CA; Department of Neuroradiology (N.L.), University of Freiburg, Germany; Department of Neurosurgery (J.B.), University of Freiburg, Germany; Department of Neurosurgery (M.F.S.), The Permanente Medical Group, Kaiser Permanente Medical Center, Redwood City, California.

From the Department of Radiology (M.D.M., A.G.), The Permanente Medical Group, Kaiser Permanente Medical Center, Santa Clara, California; Department of Radiology and Biomedical Imaging (M.D.M.), University of California, San Francisco, San Francisco, California; Kaiser Permanente Bernard J. Tyson School of Medicine (A.R.Z), Pasadena, CA; Department of Neuroradiology (N.L.), University of Freiburg, Germany; Department of Neurosurgery (J.B.), University of Freiburg, Germany; Department of Neurosurgery (M.F.S.), The Permanente Medical Group, Kaiser Permanente Medical Center, Redwood City, California.

From the Department of Radiology (M.D.M., A.G.), The Permanente Medical Group, Kaiser Permanente Medical Center, Santa Clara, California; Department of Radiology and Biomedical Imaging (M.D.M.), University of California, San Francisco, San Francisco, California; Kaiser Permanente Bernard J. Tyson School of Medicine (A.R.Z), Pasadena, CA; Department of Neuroradiology (N.L.), University of Freiburg, Germany; Department of Neurosurgery (J.B.), University of Freiburg, Germany; Department of Neurosurgery (M.F.S.), The Permanente Medical Group, Kaiser Permanente Medical Center, Redwood City, California.

From the Department of Radiology (M.D.M., A.G.), The Permanente Medical Group, Kaiser Permanente Medical Center, Santa Clara, California; Department of Radiology and Biomedical Imaging (M.D.M.), University of California, San Francisco, San Francisco, California; Kaiser Permanente Bernard J. Tyson School of Medicine (A.R.Z), Pasadena, CA; Department of Neuroradiology (N.L.), University of Freiburg, Germany; Department of Neurosurgery (J.B.), University of Freiburg, Germany; Department of Neurosurgery (M.F.S.), The Permanente Medical Group, Kaiser Permanente Medical Center, Redwood City, California.

From the Department of Radiology (M.D.M., A.G.), The Permanente Medical Group, Kaiser Permanente Medical Center, Santa Clara, California; Department of Radiology and Biomedical Imaging (M.D.M.), University of California, San Francisco, San Francisco, California; Kaiser Permanente Bernard J. Tyson School of Medicine (A.R.Z), Pasadena, CA; Department of Neuroradiology (N.L.), University of Freiburg, Germany; Department of Neurosurgery (J.B.), University of Freiburg, Germany; Department of Neurosurgery (M.F.S.), The Permanente Medical Group, Kaiser Permanente Medical Center, Redwood City, California.

From the Department of Radiology (M.D.M., A.G.), The Permanente Medical Group, Kaiser Permanente Medical Center, Santa Clara, California; Department of Radiology and Biomedical Imaging (M.D.M.), University of California, San Francisco, San Francisco, California; Kaiser Permanente Bernard J. Tyson School of Medicine (A.R.Z), Pasadena, CA; Department of Neuroradiology (N.L.), University of Freiburg, Germany; Department of Neurosurgery (J.B.), University of Freiburg, Germany; Department of Neurosurgery (M.F.S.), The Permanente Medical Group, Kaiser Permanente Medical Center, Redwood City, California.