<prompt> Fanconis anemia is aConstitutional anemiaHemolytic anemiaIron deficiency anemiaAuto - immune anemia  <response>: Constitutional pancytopeniaConstitutional pancytopenia is defined as decreased marrow production of the 3 major hematopoietic lineages on an inherited basis, resulting in anemia, neutropenia and thrombocytopenia.Important causes are : -Fanconi anemia o Amegakaryocytic thrombocytopeniaShwachman-Diamond syndrome o Down syndromeDyskeratosis congenita o Noonan syndrome 