[Dorsal radiculo-myelopathy due to ossification of the yellow ligaments. Apropos of a case].
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Biomedical subjects
Publications and source records attributed to A Deburge.
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The fate of fat grafts thicker than 5 mm applied to prevent post-operative peridural fibrosis was followed by CT scanning between the second and fourth months and in later months in four patients treated for lumbar spinal stenosis. The CT scanning findings were verified in two patients who were operated on again. The fat grafts lost thickness and became more even. In one case, the graft had completely disappeared.
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In a case of partial laminoarthrectomy for lateral recess stenosis cauda equina compression occurred post-operatively, and was caused by migration of a free graft. Recovery was complete within six months. The technical details of insertion of the free fat grafts are described.
Radiculographic X-rays and CAT scans of 60 patients operated on for stenosis of the lumbar canal were analyzed separately and retrospectively by rheumatologists, a radiologist and surgeons working jointly, without knowledge of findings revealed by surgery. Comparison of findings with a detailed surgical report reveals that in the case of central lumbar canal stenosis, CAT scan provides a higher degree of reliability (72%) in diagnosis than does radiculography (56%). With lateral stenosis of the lateral cleft, reliability of both tests is identical (62%). The diagnostic deficiencies of these two examinations are discussed as well as diagnostic criteria employed and possible avenues of research. Currently, in the case of stenosis of the lumbar canal, it is still necessary to perform both of these examinations in combination and to accept the fact that, in certain cases, only one of the two tests reveals the stenosis, to be able to attain a preoperative rate of correct diagnosis greater than 80%.
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Out of a total of 435 cases of nucleolysis, 400 case-reports of which could be used, secondary surgery was performed in 48 cases or 12% of the total. Surgery was most frequently required following L4/L5 than L5/S1 nucleolysis. The most frequent causes of failure of nucleolysis were lateral osseous stenosis (19 cases) and sub-ligamentous hernia (17 cases), apparently due to the ineffectiveness of the enzyme. Excluded hernia was rare (4 cases). Hernias at another level (4 cases) required surgery since it was not possible to repeat the injection of chymopapain. Three of these explorations were of the linea alba and one failure was due to spondylolisthesis due to isthmic lysis. Some failures occurred after some delay. The sciatic relapses after a period of complete clinical cure. In some cases, the relapse was in fact at another level or involved sub-ligamentous or excluded hernia. Surgery following nucleolysis is the same as that of an uninjected hernia; there are no adherences. The results are generally the same as those obtained by primitive surgery (two thirds favorable outcome). However, this depends mainly on what has been detected. The results are very good for hernias at another level and for excluded hernias. Fair results are obtained for stenosis and for sub-ligamentous hernias but only poor results in explorations of the linea alba.
The purpose of this study, based on a consecutive series of 350 patients treated by chemonucleolysis in a 6-year period, is to analyze the causes of failure in 38 patients who underwent subsequent surgery. The most common cause of failure in this series was lateral recess stenosis, encountered in 16 of 38 patients. In contrast a sequestrated disc was found in only four patients. Failure of the enzyme to "digest" the protruded fragment was the cause of persisting sciatica in 11 other patients. No abnormality or recurrence at another level was found in the remaining patients. The success rate of surgery was 70%. The best results were obtained when a sequestrated disc or lateral stenosis was disclosed.
Among 163 patients who underwent surgery for a degenerative lumbar stenosis, 79% were re-examined and evaluated retrospectively (2 to 14 years following surgery), using a functional grading scale. The grading scale (up to 20) assessed limping, radicular pain at rest and with effort, back pain, motor deficits, sphincter dysfunction, medication required, and quality of life. Satisfactory results were obtained in 83% with 87% reporting substantial functional improvement. Limping and radicular pain at rest responded most rapidly to surgical intervention. Subsequent disappearance of residual radicular pain occurred in 13% whether present at rest or with effort. Episodic radicular pain with effort persisted however, in approximately one-quarter of all patients, generally in those with more pronounced pain before surgery. One out of four patients had complete relief of back pain and most often without performing an arthrodesis. Major neurological deficits resolved extremely slowly but completely in six out of ten patients. On the grading scale of 20, four recovery profiles could be identified: a perfectly stable result (60%), regular improvement (14%), improvement with episodic aggravation of symptoms (19%) and subsequent worsening (8%). Overall, a second surgical intervention had to be performed in 5% of patients with complete bony excision or arthrodesis (for vertebral slippage or for back pain).