Cranial Arachnoid Protrusions and Contiguous Diploic Veins in CSF Drainage

From the Department of Neurological Surgery (S.T., Y.Y., M.I.), Juntendo University Urayasu Hospital, Chiba, Japan; Department of Neurological Surgery (I.O., M.M., H.A.), Juntendo University School of Medicine, Tokyo, Japan; and Division of Radiological Technology (M.N.), Medical Satellite Yaesu Clinic, Tokyo, Japan.

From the Department of Neurological Surgery (S.T., Y.Y., M.I.), Juntendo University Urayasu Hospital, Chiba, Japan; Department of Neurological Surgery (I.O., M.M., H.A.), Juntendo University School of Medicine, Tokyo, Japan; and Division of Radiological Technology (M.N.), Medical Satellite Yaesu Clinic, Tokyo, Japan.

From the Department of Neurological Surgery (S.T., Y.Y., M.I.), Juntendo University Urayasu Hospital, Chiba, Japan; Department of Neurological Surgery (I.O., M.M., H.A.), Juntendo University School of Medicine, Tokyo, Japan; and Division of Radiological Technology (M.N.), Medical Satellite Yaesu Clinic, Tokyo, Japan.

From the Department of Neurological Surgery (S.T., Y.Y., M.I.), Juntendo University Urayasu Hospital, Chiba, Japan; Department of Neurological Surgery (I.O., M.M., H.A.), Juntendo University School of Medicine, Tokyo, Japan; and Division of Radiological Technology (M.N.), Medical Satellite Yaesu Clinic, Tokyo, Japan.

From the Department of Neurological Surgery (S.T., Y.Y., M.I.), Juntendo University Urayasu Hospital, Chiba, Japan; Department of Neurological Surgery (I.O., M.M., H.A.), Juntendo University School of Medicine, Tokyo, Japan; and Division of Radiological Technology (M.N.), Medical Satellite Yaesu Clinic, Tokyo, Japan.

From the Department of Neurological Surgery (S.T., Y.Y., M.I.), Juntendo University Urayasu Hospital, Chiba, Japan; Department of Neurological Surgery (I.O., M.M., H.A.), Juntendo University School of Medicine, Tokyo, Japan; and Division of Radiological Technology (M.N.), Medical Satellite Yaesu Clinic, Tokyo, Japan.

From the Department of Neurological Surgery (S.T., Y.Y., M.I.), Juntendo University Urayasu Hospital, Chiba, Japan; Department of Neurological Surgery (I.O., M.M., H.A.), Juntendo University School of Medicine, Tokyo, Japan; and Division of Radiological Technology (M.N.), Medical Satellite Yaesu Clinic, Tokyo, Japan.