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Koga. Mini-invasive Surg 2017;1:41-2 Mini-invasive Surgery
DOI: 10.20517/2574-1225.2017.14
www.misjournal.net
Topic: Percutaneous endoscopic system for spinal diseases Open Access

Preface of the special issue on

"Percutaneous endoscopic system for

spinal diseases"

Hisashi Koga
1,2
1 Department of Neurosurgery and Orthopaedics, Iwai Orthopaedic Medical Hospital, Edogawa-ku, Tokyo 133-0056, Japan.
2 Department of Orthopaedic Surgery, Inanami Spine and Joint Hospital, Shinagawa-ku, Tokyo 140-0002, Japan.
Correspondence to: Dr. Hisashi Koga, Department of Orthopaedics, Iwai Orthopaedic Medical Hospital, 8-17-2 Minamikoiwa, Edogawa-ku, Tokyo 133-
0056, Japan. E-mail: hkoga0808@gmail.com

How to cite this article: Koga H. Preface of the special issue on "Percutaneous endoscopic system for spinal diseases". Mini-invasive Surg 2017;1:41-2.
Article history: Received: 13-04-2017 Accepted: 14-04-2017 Published: 30-06-2017

Dr. Hisashi Koga is the Deputy Director and the Head of Education and Training Center, Iwai Orthopaedic
Medical Hospital, Japan. He obtained his MD in the University of the Ryukyu Faculty of Medicine (Okinawa,
Japan) and PhD in the Graduate Medical School of Kumamoto University (Kumamoto, Japan). His research
interest focuses on endoscopic spinal surgery and minimally invasive spinal surgery. He has authored 8 articles
on his research field in recent 3 years. He also obtained research grant from Humboldt foundation.

It is our great privilege to present the special issue advancement of operative instruments. In particular,
of Mini-invasive Surgery, an open-access journal the development of a high-speed drill used in narrow
devoted to exploring many contemporary issues and long endoscopic lumen has expanded not only
affecting minimally invasive surgery. The first special target spinal diseases, but also the operative spinal
issue of Mini-invasive Surgery is intended to introduce area. Currently, we are already able to successfully
the latest advancement of percutaneous endoscopic treat cervical radiculopathy (Ohmori et al.), lumbar
lumbar discectomy (PELD), which is a single portal spinal canal stenosis (Ohara et al.), LDH with narrow
full-endoscopic system originally developed for the interlaminar space (Koga et al.), and cervical spinal
treatment of lumbar disc herniation (LDH). As PELD canal stenosis (Nishimura) with PELD. However, this
has been rapidly growing in East Asia (China, Korea, technique does have some limitations, which must be
and Japan), we invited submissions from these recognized and we must utilize the supportive materials
countries. The majority of the articles are from Japan. such as free-running electromyogram monitoring
However, articles presented in this issue cover all (Kitahama et al.) to secure safety of the technique.
recent advancements in the field of PELD.
The technique of PELD requires some specific
PELD technique has been developed along with the technical and anatomical considerations that will be

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