<prompt> Needle shaped crystals negatively birefringent on polarized microscopy is Characeteristic of which crystal assosciated ahropathyGoutCPPDNeuropathic ahropathyHemophilic ahropathy  <response>: Crystals of gout ---needle shaped and strongly negative bifringent Crystals of pseudogout ---rhomboid shaped and weakly positive bifringent Refer : Harrinson 20ththe p 2165 maheswari 9th ed 