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Most cartilage forming tumors are benign and rarely affect the spinal canal, their principal location is in humerus metaphysis, femur and tibia. They represent 2% of all tumors and 2.6% of the benign tumors of the spine, usually located at the cervical spine. It is speculated that the secondary ossification center may be aberrant cartilaginous tissue that causes the formation of osteochondroma. From 1 to 4% of osteochondromas involve the spine and are commonly included in the posterior elements of the vertebrae and if located near neurological structures causing irritation and spinal compression is rare but potentially catastrophic. The average age of clinical onset is at the 2nd and 3rd decade of life. Case presentation: 50-year-old male who began his illness four years ago with pain in the lumbar region with right leg paresthesias, muscle strength 4/5 in the dermatomes L4 and L5, pain was increasing in intensity and frequently. The complete cure was to remove the exostosis of the lamina of right side of L4 with projection to the medullary canal and origin of the contact with the root of L4. We performed: clinical history, physical examination, X-rays, magnetic resonance imaging, electromyography, histology. It was performed: total removal of the tumor effectively and symptoms disappeared. As the spinal osteochondromas are rare and tend to occur in young adults. [ABSTRACT FROM AUTHOR]

Unlabelled: We carried out a retrospective study of the clinical results of lumbosacral decompression with Mc Bride technique, in treatment of degenerative unstable lumbar stenosis. Three hundred and forty patients (180 male) were treated during May 1996 to May 2003. Mean age at surgery was 47 years old (22-85) with 3 to 8 years of follow up. All patients fulfilled clinical and image criteria for chronic lumbar pain due to degenerative lumbar stenosis and segmental instability that did not improve with conservative treatment., Results: We found very good results in 114 patients (33.5%), good in 203 patients (59.7%), regular in 16 patients (4.7%), and poor in 6 patients (2%). The Mc Bride technique is based in interlaminar distraction and permits managing lumbar stenosis and arthrodesis of an unstable segment simultaneously. It diminishes compression in the foramen, maintains a position in extension, reduces facet joints subluxation and eliminates the strategic point of intervertebral mobility in facet joints. It allows immediate stabilization and later fusion by placing a bone block.

Unlabelled: Most cartilage forming tumors are benign and rarely affect the spinal canal, their principal location is in humerus metaphysis, femur and tibia. They represent 2% of all tumors and 2.6% of the benign tumors of the spine, usually located at the cervical spine. It is speculated that the secondary ossification center may be aberrant cartilaginous tissue that causes the formation of osteochondroma. From 1 to 4% of osteochondromas involve the spine and are commonly included in the posterior elements of the vertebrae and if located near neurological structures causing irritation and spinal compression is rare but potentially catastrophic. The average age of clinical onset is at the 2nd and 3rd decade of life., Case Presentation: 50-year-old male who began his illness four years ago with pain in the lumbar region with right leg paresthesias, muscle strength 4/5 in the dermatomes L4 and L5, pain was increasing in intensity and frequently. The complete cure was to remove the exostosis of the lamina of right side of L4 with projection to the medullary canal and origin of the contact with the root of L4. We performed: clinical history, physical examination, X-rays, magnetic resonance imaging, electromyography, histology. It was performed: total removal of the tumor effectively and symptoms disappeared. As the spinal osteochondromas are rare and tend to occur in young adults.