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 Needle shaped crystals negatively birefringent on polarized microscopy is Characeteristic of which crystal assosciated ahropathy and explain in detail?
Crystals of gout ----needle shaped and strongly negative bifringent Crystals of pseudogout -----rhomboid shaped and weakly positive bifringent Refer : Harrinson 20thth/e p 2165 maheswari 9th ed