Introduction Indications far lateral disc herniation pars defect Internervous Plane Intermuscular plane between multifidus longissimus Postition & Preparation Position prone on Wilson or Jackson table Imaging must confirm level with AP/lateral radiograph Approach Incision incision make 3 cm from midline Superficial dissection find plane between multifidus and longissimus and develop with blunt dissection Deep dissection manually palpate transverse process place clamp on transverse process and confirm level with radiograph dissect transverse process above and below identify pars medially Dangers Dorsal root ganglion