<prompt> MYD88 L265P mutation is seen in?Hairy cell leukemiaWaldenstrom MacroglobulinemiaMultiple MyelomaAML  <response>: Ans. b Waldenstrom MacroglobulinemiaMYD88 L265P mutation is detectable in all patients with Waldenstro..ms macroglobulinemia, therefore representing a hallmark of the disease. 