Background: Abdominal wall surgery has changed dramatically in recent years. The current management of lumbar hernias should reflect the development of modern imaging techniques and new forms of noninvasive treatment. Objective: To review and update knowledge on lumbar hernias. Data Sources: Literature review using MEDLINE with the key words "lumbar hernia" for the years 1950 through 2004. For an analysis prior to this date (1750-1950), we used cases reported by Thorek. Our own study of 28 patients was also included. Study Selection: All articles reporting clinical cases on lumbar hernia. Data Extraction: Two reviewers analyzed the epidemiological, clinical, and treatment data of the articles. Data Synthesis: One hundred thirty-five clinical case articles and 8 studies with more than 5 patients, together with our personal experience of 28 cases, were ana