Difference between revisions of "Polycythemia vera"

(Differential Diagnosis)
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==Background==
 
==Background==
*Chronic myeloproliferative disorder
+
*Chronic [[myeloproliferative disorders|myeloproliferative disorder]]
 
*Abnormal proliferation is seen in all 3 cell lines
 
*Abnormal proliferation is seen in all 3 cell lines
 
*Typically in elderly
 
*Typically in elderly
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*Severe burning pain in the hands or feet accompanied by a reddish or bluish coloration of the skin
 
*Severe burning pain in the hands or feet accompanied by a reddish or bluish coloration of the skin
 
*Suspected with any combination of the following: <ref>http://emedicine.medscape.com/article/205114-differential</ref>
 
*Suspected with any combination of the following: <ref>http://emedicine.medscape.com/article/205114-differential</ref>
**Abnormally elevated hemoglobin levels (>18 g/dL in men; 16 g/dL in women)
+
**Abnormally ''elevated'' hemoglobin levels (>18 g/dL in men; 16 g/dL in women)
 
**Normal oxygen saturation
 
**Normal oxygen saturation
 
**Bleeding complications
 
**Bleeding complications
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==Differential Diagnosis==
 
==Differential Diagnosis==
*Essential thrombocytosis (ET)
+
*[[Essential thrombocytosis (ET)]]
 
*[[Chronic myelogenous leukemia]] (CML)
 
*[[Chronic myelogenous leukemia]] (CML)
 
*[[Leukemoid Reaction]]
 
*[[Leukemoid Reaction]]

Revision as of 17:37, 1 October 2019

Background

  • Chronic myeloproliferative disorder
  • Abnormal proliferation is seen in all 3 cell lines
  • Typically in elderly
  • Can be asymptomatic or symptomatic
  • Commonly caused by JAK2 mutation

Clinical Features

  • Severe burning pain in the hands or feet accompanied by a reddish or bluish coloration of the skin
  • Suspected with any combination of the following: [1]
    • Abnormally elevated hemoglobin levels (>18 g/dL in men; 16 g/dL in women)
    • Normal oxygen saturation
    • Bleeding complications
    • Portal vein thrombosis
    • Splenomegaly
    • Plethora
    • Pruritus after bathing

Differential Diagnosis

Evaluation

Workup

  • CBC
  • Chem 7
  • ESR
  • EPO decreased
  • Bone marrow biopsy sometimes needed

Evaluation[2]

  • Criteria 1: All category A
  • Criteria 2: First 3 of category A and any 2 of category B
Category A Category B
Increased RBC Mass (Men >18.5, Women >16.5) Thrombocytosis (>400,000)
Normal SPO2 (>92%) Leukocytosis (>12,000)
Splenomegaly Leukocyte Alk Phos >100
Vit B12 >900

Management

  • Phlebotomy with goal hematocrit < 45%[3]
    • Patients with severe plethora, with AMS or vascular compromise can be bled vigorously with removal of 500 mL of whole blood rapidly
    • Otherwise, gradual phlebotomy of 500-1000 mL over 24 hours is preferred in less emergent cases
  • ASA 81mg
  • Myelosuppressive agents (hydroxyurea, interferon-α)

Also See

References

  1. http://emedicine.medscape.com/article/205114-differential
  2. Tefferi, A, et al. The 2008 World Health Organization classification system for myeloproliferative neoplasms: order out of chaos. Cancer. 2009; 115(17):3842-7,
  3. Marchioli R et al. Cardiovascular events and intensity of treatment in polycythemia vera. N Engl J Med. 2013; 368(1):22-33.