<prompt> Following are seen in polycythemia vera except: September 2011Most common cause of polycythemiaIncreased erythropoietinErythropoietin independent growth of red cell progenitorsIntrinsic abnormality of hematopoietic precursors  <response>: Ans. B: Increased erythropoietin The combination of iron deficiency anemia, glossitis and esophageal dysphagia usually related to the webs is known as the Plummer Vinson syndrome or Paterson Kelly syndrome. Plummer-Vinson syndromePVSPaterson-Brown-Kelly syndromesideropenic dysphagia It presents as a triad of dysphagia due to esophageal webs, glossitis, and iron deficiency anemia. In primary polycythemia, there may be 8 to 9 million and occasionally 11 million erythrocytes per cubic millimeter of blood a normal range for adults is 4-6, and the hematocrit may be as high as 70 to 80. In addition, the total blood volume sometimes increases to as much as twice normal. 