Fig. 4From: Clinical and radiologic outcomes of biportal endoscopic lumbar discectomy in obese patients: a retrospective case-control studyMicroscopic surgery using a tubular retractor (A) versus biportal endoscopic surgery (B) in an obese patient. In patients with obesity, the surgical field is deeper and muscle retraction is more difficult. In such cases, biportal endoscopic surgery can be performed with fewer restrictionsBack to article page