This volume of the Keio University International Symposia for LifeSciences and Medicine contains the proceedings of the eleventh symposium held under the sponsorship of the Keio University Medical Science Fund. As explained in the Opening Remarks by the President of Keio University, the fund was established by the generous donation of Dr. Mitsunada Sakaguchi. The Keio University International Symposia for Life Sciences and Medicine constitute one of the core activities sponsored by the fund, the objective of which is to contribute to the international community by developing human resources, promoting scientific knowledge, and encouraging mutual exchange. Each year, the Committee of the International Symposia for Life Sciences and Medicine selects the most significant symposium topic from applications received from the Keio medical community. The publication of the proceedings is intended to publicize and disseminate the information arising from the lively discussions of the most exciting and current issues presented during the symposium. On behalf of the Committee, I am most grateful to Dr. Mitsunada Sakaguchi, who made the symposia series possible. Weare also grateful to the prominent speakers for their contribution to this volume. In addition,wewould liketo acknowledge the efficientorganizational work performed by the members of the program committee and the staff of the fund. Naoki Aikawa,M.D.,D.M.Sc., EA.C.S.
1 Tumor Size.- Proposal for Reporting Size of Vestibular Schwannoma.- Proposal for Reporting on Size and Site of Residual Vestibular Schwannoma.- Classification of Vestibular Schwannoma (Acoustic Neuroma).- The Size of the Tumor in Acoustic Neuroma: Proposal for a Reporting System.- Proposal for Definition of Tumor Size.- Classification of Tumor Size from the Point of View of Functional Preservation, Based Upon Our 53 Surgical Cases with Acoustic Neuroma.- Definition of Tumor Size of Vestibular Schwannomas.- Surgical Classification and Predictive Factors in Acoustic Neuromas.- A Classification System for Vestibular Schwannomas.- Measurement of Tumor Volume in Acoustic Neurinomas.- Tumor Volume Measurements of Acoustic Neuromas with MR Imaging.- Volume Analysis and Examination of Parameters of the Tumor Diameter by Three-dimensional Reconstruction of Vestibular Schwannomas.- 2 Facial Nerve Function.- Moffat Classification of Facial Nerve Function.- Which International System Must be Chosen to Assess the Facial Function Before and After Acoustic Neuroma Treatment?.- Preservation of Facial Nerve Function After Acoustic Neuroma Surgery: Modification of the Facial Nerve Grading System.- Assessment of Facial Nerve Function Following Acoustic Neuroma Surgery: Facial Nerve Grading Systems.- 3 Pre- and Postoperative Hearing.- Patient Selection and Method of Evaluation for Hearing Preservation in Acoustic Neuroma Surgery.- Some Proposals on Reporting Systems in Acoustic Neuroma.- Outcome Reporting in Hearing Preservation Surgery: The Place of the MRI Follow-Up.- New Classification of Postoperative Hearing Results Following Acoustic Neuroma Surgery.- Sense and Nonsense of Hearing After Vestibular Schwannoma Surgery.- 4 Effect of Radiotherapy.- Long-Term Follow-up Results with Audiological Assessment After Fractionated Stereotactic Radiotherapy for Vestibular Schwannomas.- Gamma Knife Radiosurgery in Vestibular Schwannomas: Clinical and Radiological Impact on the Tumor Course.- 5 Neurological Symptoms and Other Related Items.- Functional Staging of Acoustic Neuromas.- Evaluation of Tinnitus Before and After Microsurgical Resection of Acoustic Tumors.- Indices of Facial Features Obtained from Contour Extraction with Image Processing and Its Application to Objective Estimation of Facial Palsy.- 6 Summaries of Meeting Sessions.- Session I: Reporting the Size of Vestibular Schwannomas.- Session I: Reporting System for the Size and Site of Residual Vestibular Schwannomas.- Session II: Grading Systems for Facial Nerve Function.- Session III: Grading Systems for Preoperative and Postoperative Hearing.- Session IV: Evaluation of Preoperative Symptoms and Postoperative Complications.- Session V: Evaluation of the Effect of Radiotherapy.- Session VI: Other Issues.- Appendix: Results of Questionnaires of Reporting System.- Key Word Index.