The document discusses the history and use of percutaneous discectomy to treat discogenic back pain. It notes that Lyman Smith introduced chemonucleolysis in 1963 and Kambin performed nucleotomy through a cannula in 1973. Hijikata published results in 1975 using a 7mm cannula for percutaneous discectomy, reporting a 75% satisfactory outcome. It then presents a case study of a 43-year-old male with severe back pain radiating to his left lower limb who was not improving with conservative care and was reluctant to have surgery, making him a candidate for percutaneous discectomy.