You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Lumbar canal stenosis presents as ? and explain in detail?
Ans. is 'a' i.e., Claudication The patient of lumbar canal stenosis is usually a man aged over 50, complains of aching, heaviness, numbness and paraesthesia in the thighs and legs; it comes on after standing upright or walking for 5-10 minutes, and is consistently relieved by sitting, squatting or leaning against a wall to flex the spine (hence the term 'spinal claudication').