transforaminal-full-endoscopic-lumbar-foraminotomy-under-local

Transforaminal Full-Endoscopic Lumbar Foraminotomy Under Local Anesthesia for L5/S1 Adjacent Segment Foraminal Stenosis

Foraminal stenosis in patients with L5/S1 adjacent segment disease (ASD) presents a significant clinical challenge, as conventional treatment often ...

full-endoscopic-trans-kambin-triangle-lumbar-interbody-fusion

Full-Endoscopic Trans-Kambin Triangle Lumbar Interbody Fusion : Surgical Technique

The goal of this protocol is to provide a reproducible method for performing full-endoscopic trans-Kambin triangle lumbar interbody fusion (KLIF). Lumbar ...

Tokushima University Graduate School, Institute of Health Sciences

Tokushima University Graduate School

The lesion of the lumbar endplate is sometimes identified in the vertebrae of children and adolescents. The purpose of this study is to compare between skeletal maturity and chronological age. The second purpose of this study is to clarify the lesions of the lumbar endplate based on the maturation of the lumbar vertebral body. Six hundred and thirty-two (485 men and 147 women) consecutive patients were included. The mean age at the first medical examination was 13.8 years. Their skeletal maturity was evaluated based on the appearances of the secondary ossification center of L3. The area of the endplate lesions was classified into five types. The apophyseal stage was observed from 10 years old to 18 years old, and the apophyseal stage was shown the peak at 14 years old. The appearance of the apophyseal ring was observed earlier in female patients than in male patients. For the concave type, the lesion at upper level vertebra was more prevalent. The anterior and middle type of the lesion at upper level vertebra was more prevalent. For the posterior type, the lesion of the inferior rim of L4 and the lesion of the rim of L5 were more prevalent. This study emerged after comparing skeletal maturity based on the maturation of the lumbar vertebral body with the chronological age of a large number of patients and examining the lesions of the lumbar endplate based on the stage of maturation of the lumbar vertebral body.

Study of lesions of the lumbar endplate based on the stage of maturation of the lumbar vertebral body: the relationship between skeletal maturity and chronological age.

An understanding of the insertional footprints of the capsular ligaments of the hip is important for preserving hip function and stability given the increasing number of minimally invasive hip surgeries being performed under a limited surgical view. However, it is difficult to detect these ligaments intraoperatively and many surgeons may not fully appreciate their complex anatomy. The aims of this study were to quantify the proximal and distal footprints of the iliofemoral ligament (ILFL) and ischiofemoral ligament (ISFL) and to estimate the location of the corresponding osseous landmarks on the proximal femur, which can be detected easily during surgery.

Anatomic evaluation of the insertional footprints of the iliofemoral and ischiofemoral ligaments: a cadaveric study.

Hypertrophy of the ligamentum flavum (LF) is a major contributor to the development of lumbar spinal canal stenosis (LSS). Although previous studies have identified some factors related to hypertrophy of the LF, the etiology remains unclear. It is well known that myofibroblasts have a key role in the pathology of fibrosis in other tissues, including the skin, liver, kidney, and lung. We hypothesized that myofibroblasts were also important players in the pathology of fibrosis in the LF.

Myofibroblasts are increased in the dorsal layer of the hypertrophic ligamentum flavum in lumbar spinal canal stenosis.

Patient-perceived leg length discrepancy (PLLD) is one of the major postoperative complications of total hip arthroplasty (THA). This study aimed to identify factors that cause PLLD following THA.

Impact of the hip-spine relationship and patient-perceived leg length discrepancy after total hip arthroplasty: A retrospective study.

Although bicruciate stabilized total knee arthroplasty (BCS-TKA) is expected to provide kinematics similar to those of the normal knee, there are limited data available for comparison of the kinematics of the knee after BCS-TKA with those of the normal knee. The purpose of this study was to confirm whether the knee after BCS-TKA are the same as those of the native knee.

Kinematic comparison between the knee after bicruciate stabilized total knee arthroplasty and the native knee: A cadaveric study.

Full-endoscopic spine surgery via a transforaminal approach (TF-FESS) is minimally invasive and could help athletes quickly return to play. When treating professional athletes, we have to consider their season schedule. In this study, we investigated the characteristics of Japanese professional baseball players who underwent TF-FESS and examine how the timing of surgery influenced their postoperative course.

Return-to-play outcomes after full-endoscopic spine surgery under local anesthesia in professional baseball players: Comparison by timing of surgery.

The transforaminal (TF) approach in full endoscopic spine surgery (FESS) is the least invasive spinal surgery, as it can be performed under local anesthesia with only an 8-mm skin incision. Transforaminal FESS-based foraminotomy was first performed in the early 2000s for the decompression of foraminal stenosis. The technique has improved year by year over the past 2 decades. In our hospital, full endoscopic lumbar foraminotomy (FELF) has been performed since 2015. Since our development of the FESS undercutting laminectomy procedures in 2019, the size of the decompressed area achieved by FELF has increased.

ArticleTotal : 2	Year
Publication title Cited by 1	2025
Publication title	2026

Article	Year
Study of lesions of the lumbar endplate based on the stage of maturation of the lumbar vertebral body: the relationship between skeletal maturity and chronological age. European journal of orthopaedic surgery & traumatology : orthopedie traumatologie\| PubMed ID: 28918493	2018
Anatomic evaluation of the insertional footprints of the iliofemoral and ischiofemoral ligaments: a cadaveric study. BMC musculoskeletal disorders\| PubMed ID: 33298008	2020
Myofibroblasts are increased in the dorsal layer of the hypertrophic ligamentum flavum in lumbar spinal canal stenosis. The spine journal : official journal of the North American Spine Society\| PubMed ID: 34775048	2022
Impact of the hip-spine relationship and patient-perceived leg length discrepancy after total hip arthroplasty: A retrospective study. Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association\| PubMed ID: 37055272	2024
Kinematic comparison between the knee after bicruciate stabilized total knee arthroplasty and the native knee: A cadaveric study. The Knee\| PubMed ID: 37120864	2023
Return-to-play outcomes after full-endoscopic spine surgery under local anesthesia in professional baseball players: Comparison by timing of surgery. Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association\| PubMed ID: 38302309	2025
Impact of Extended Endoscopic Lumbar Foraminotomy on Postoperative Surgical Outcomes: Is Greater Decompression Beneficial? International journal of spine surgery\| PubMed ID: 40854732	2025
Approach-related safety considerations for transforaminal full-endoscopic lumbar spine surgery. European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society\| PubMed ID: 40911072	2025

Koichi Sairyo

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