We have reported three cases of iatrogenic lumbar meningocoeles after surgery for herniated lumbar intervertebral discs. We reject the term spurious, pseudo, or false as given by earlier writers. We feel that, in reality, these sacs are true meningocoeles, with complete arachnoidal lining and freely communicating with the intraspinal subarachnoid space. We have also given a brief outline of the clinical features, elucidated the mechanisms operative in the production of symptoms, and suggested the cardinal features of radiographic diagnosis. Prevention is, of course, the best way to avoid this complication. If a dural tear does occur, every effort should be made to suture it in a watertight manner.
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