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Causes of laryngeal cancer. Laryngeal cancer is caused by changes in the cells of the larynx, although it's not clear exactly why this happens. All cancers begin with a change in a cell's DNA. DNA provides our cells with a basic set of instructions, such as when to grow and reproduce.his causes the cells to reproduce in an uncontrollable manner, producing a growth of tissue called a tumour. It's not known why the DNA inside the cells of the larynx is affected in cases of laryngeal cancer.
Common lower back problems that cause pain in segment L4-L5 include: 1  L4-L5 disc herniation: The most common place for a disc to herniate is at L4-L5 or L5-S1 because of the amount of weight these segments carry and due to their range of motion. The back of the L4-L5 segment has a nerve that passes through it, from inside the spinal canal down through the back of each leg (as part of the sciatic nerve).