Insights

From Practice

Notes, case reports, technical observations, and perspective essays on neurosurgery and minimally invasive spine practice.

Perspective

What I Still Don’t Know About Pain

We often stare at MRI images searching for answers. Yet the image reveals only anatomy. It shows the shape of bones, ligaments, and nerves, but not necessarily how they function.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · Vol. I · June 2026 · 4 min read
Perspective

Reading MRIs at Night

At night, after all consultations and surgeries have ended, only the cool black-and-white cross-sections remain on the clinic monitor. In this hour, cleared of the day’s bustle, I face the anatomical structures within the images in absolute solitude.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · Vol. I · June 2026 · 4 min read
Technical Note

ERAS in UBE

A practical framework for applying Enhanced Recovery After Surgery (ERAS) principles to unilateral biportal endoscopic spine surgery — the three-phase ERAS triad (preoperative, intraoperative, postoperative), core elements adapted to the UBE surgical profile, and the common pitfalls of real-world implementation.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 10 min read
Editorial

On the Long View in Minimally Invasive Spine Surgery

A reflection on the asymmetry between short- and long-term outcomes in minimally invasive spine surgery, the lessons fusion has taught the field, the role of the learning curve, the moving target paradox of evaluating surgical innovation, and the discipline required to navigate speed and direction in an era of accelerating technical change.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 11 min read
Technical Note

Hemostasis Strategy in UBE

A practical strategy for hemostasis in unilateral biportal endoscopic spine surgery — classification of bleeder sources, principles of RF coagulation, source-specific management, and prevention of postoperative epidural hematoma.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 10 min read
Technical Note

Fluid Management & Irrigation Control in UBE

A hands-on guide to fluid dynamics and irrigation control in unilateral biportal endoscopic spine surgery — hydrodynamic principles, optimal pressure settings, and prevention of irrigation-related complications.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 10 min read
Technical Note

Working Portal Triangulation in UBE

A hands-on guide to the foundational portal placement geometry in unilateral biportal endoscopic spine surgery.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 9 min read
Journal Club

UBE-LIF: First Technical Description

First technical description of fully endoscopic lumbar interbody fusion using a unilateral biportal approach.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 6 min read
Perspective

The Surgery Went Well

A fellow's first lead case taught a lesson no textbook had. On technique, timing, and what surgery cannot undo.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 5 min read
Perspective

On the Discipline of Smaller Incisions

A patient's first question on the day after surgery is rarely about the angled instrument that reached behind the lamina, or the precise plane of dissection that spared the descending nerve root.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · May 2026 · 6 min read
Editorial

Biportal Endoscopy in the Aging Spine

The population presenting to spine clinics in Korea has changed during my career, and the change is not subtle.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · April 2026 · 7 min read
Notes

Reading the Lateral Recess

This note is written for the trainee—the early resident, the visiting observer, the fellow in transition—whose first impressions of spinal anatomy were shaped, as mine were, by textbook diagrams rather than by the operative field.

Hyun-Jin Hong, M.D. · Department of Neurosurgery, Saegijun Hospital · March 2026 · 5 min read