Radiation Exposure Reduction in Ultrasound-Guided Transforaminal Percutaneous Endoscopic Lumbar Discectomy for Lumbar Disc Herniation: A Randomized Controlled Trial.

Background: Transforaminal percutaneous endoscopic lumbar discectomy (TF-PELD) is a minimally invasive technique with high radiation exposure. The purpose of this study was to compare radiation exposure of ultrasound-guided TF-PELD with fluoroscopy-guided TF-PELD.

Methods: In this prospective randomized controlled clinical trial, 60 patients with lumbar disc herniation were enrolled and randomly assigned to 2 groups (30 cases in each group): the ultrasound-guided group or the fluoroscopy-guided group.

Genetic polymorphism of MTHFR A1298C and esophageal cancer susceptibility: a meta-analysis.

Background: Associations between the methylenetetrahydrofolate reductase (MTHFR) A1298C polymorphism and esophageal cancer risk have been reported in many articles recently, but results were controversial. Therefore the present meta-analysis was conducted to to provide a more precise estimation.

Methods: Odds ratios (ORs) with 95% confidence intervals (CIs) were used to evaluate the strength of associations.

[Treatment of thoracic vertebrae tumor with posterior total vertebral resection and internal fixation].

Objective: To evaluate the clinical outcome of posterior total vertebral resection in treating thoracic vertebrae tumor in order to provide a safe and effective method in rebuilding spine stability.

Methods: From 2002.1 to 2007.