<prompt> Presence of Birbeck granules in histopathological examination suggests:Plasmacytoma.Burkett lymphoma.Langerhan cells histiocytosis.All of the above  <response>: The old term histiocytosis X is replaced by new term called Langerhans cell histiocytois LCH. The presence of birbeck granules is characteristic finding in LCH. 