<prompt> Pancytopenia with hypercellular marrow could be due to all, EXCEPT:MyelodysplasiaParoxysmal nocturnal hemoglobinuriaSarcoidosisDyskeratosis congenita  <response>: Dyskeratosis congenita is associated with pancytopenia and hypocellular bone marrow. Pancytopenia with hypercellular marrow is seen in: Myelodysplasia Myelofibrosis Hairy cell leukemia Tuberculosis Sarcoidosis Brucellosis PNH Hypocellular Bone marrow - Cytopenia: Q fever Legionnaires disease Anorexia nervosa, starvation Mycobacterium 