Re: lumbar spinal disorders
You may want to post on the Back Problems board as most of the focus of discussion here in on the cervical spine.
The lamina is part of the bony ring that makes up the rear part of the vertebra that surrounds and protects the spinal cord. When you have a laminectomy part of the lamina is drilled through this leaves a defect that is known as a laminectomy defect. This does not mean that any thing has gone wrong and is not a disc problem. It's just a normal finding after a laminectomy.
Rt thumb fusion '13. R&L thumb arthroplasty '12 ; RT TKR & Bilat CTS' 11. Fusions: L5-S1('87), L4-S1('93), C5-C7('06), L3-S1('10), C4-C5('13). C5-C7 foraminotomy '08