Pakistan Journal of Neurological Surgery is the official journal of the Pakistan Society of Neurosurgeons published by the Department of Neurosurgery, PGMI/Lahore General Hospital, Lahore. This is published biannually. It contains origianl research articles, review papers, case reports and updates in Neurosurgery. The Editorial board makes every effort to ensure the accuracy and authenticity of material printed in this journal. However, conclusions and statements expressed are views of the authors and do not necessarily reflect the opinion of the editorial board.

Material printed in the journals is the copyright of Pakistan Journal of Neurological Surgery and may not be reproduced without the permission of the Editors or Publisher.

Prospective authors should consult instructions to the authors before sending their articles and other material for publication. The Pakistan Journal of Neurological Surgery accepts only original material for publication with the understanding that except for abstracts, no part of the data has been published or will be submitted for publication elsewhere.

Managing Editor
Dr. Muhammad Anwar Chaudhary
Department of Neurosurgery, Lahore General Hospital, Lahore.
Mailing Address: 143-A, New Muslim Town, Lahore.

Journal Research Team
Dr. Babar Butt (F.C.P.S.)
Dr. Fauzia Sajjad (F.C.P.S.)
Dr. Salman Jaffary (M.S.)
Dr. Asif Rana (M.S.I.)

Prof. Javed Majid Mian

Nizami Press, Retigon Road, Lahore.

Zercon Graphics, Lahore.

I'm extremely thankful to all peer reviewers for their valuable contribution to this Journal. My seniors Prof. Nazir Ahmad, Prof. Tariq Salahuddin, Dr. Naveed Ashraf, and Prof. Bashir Ahmad helped me a lot for publisheing this issue. I'm grateful to Journal Research Team, Dr. Abdullah Haroon, and the Postgraduate residents of Department of Neurosurgery, L.G.H. Lahore for their coopration and support to me. Dr. Muhammad Akmal, Dr. Asif Rashid and Dr. Azam Niaz, all were helpful to me for proof reading and helping for financial aspects. I give special credit to Dr. Asif Rashid who got the ISSN number from France. I'm thankful to Pharmaceutical companies for their financial support to this Journal.

Dr. Muhammad Anwar Chaudhary
Managing Editor