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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: 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.