Changes in cervical sagittal alignment after single-level posterior percutaneous endoscopic cervical diskectomy.

Study Design Case series. Objective Posterior percutaneous endoscopic cervical diskectomy (PECD) can preserve the disk in patients with a foraminal disk herniation. However, progressive angulation at the operated segment is a concern, especially for patients with cervical lordosis < 10 degrees.

Revisional percutaneous full endoscopic disc surgery for recurrent herniation of previous open lumbar discectomy.

Study Design: A retrospective study.

Purpose: To determine the feasibility and effectiveness of revisional percutaneous full endoscopic discectomy for recurrent herniation after conventional open disc surgery. OVERVIEW OF THE LITERATURE: Repeated open discectomy with or without fusion has been the most common procedure for recurrent lumbar disc herniation.