56 year old male presented with one month history of vomiting with abdominal pain; hemogram suggested polycythemia with hemoglobin of 16.5-18.1gm%, gastroscopy showed pan gastritis, bone marrow smear, biopsy showed erythroid, megakaryocytic hyperplasia;ultra sonogram abdomen, pelvis did not show any significant abnormality; patient improved with parenteral hydration, proton pump inhibito...