Leukocyte alkaline phosphatase
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Vendhan Ramanujam M.B.B.S [2]
Synonyms and keywords: LAP
Overview
Leukocyte alkaline phosphatase is an enzyme found within white blood cells. The blood level of leukocyte alkaline phosphatase is measured in order to help in the diagnosis of certain conditions. Higher levels of the enzyme are seen in polycythemia vera, essential thrombocytosis, primary myelofibrosis and leukemoid reaction. Lower levels are found in chronic myelogenous leukemia, aplastic anemia, paroxysmal nocturnal hemoglobinuria and acute myelogenous leukemia.
Causes of Increased Leukocyte alkaline phosphatase
Life Threatening Causes
Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.
- Appendicitis
- Blood transfusion
- Burns
- Diabetic coma
- Diabetic ketoacidosis
- Eclampsia
- Epidural hemorrhage
- Hemorrhagic shock
- Hepatic necrosis
- Insect venoms
- Intracerebral hemorrhage
- Ischemic colitis
- Myocardial infarction
- Osteomyelitis
- Pelvic abscess
Common Causes
- Acute leukemia
- Essential thrombocytosis
- Leukemoid reaction
- Malignant lymphoma
- Megaloblastic anemia
- Multiple Myeloma[1]
- Myelofibrosis
- Polycythemia Vera
- Solid tumors
- Tissue necrosis[2][3]
Causes by Organ System
Causes in Alphabetical Order
Causes of Decreased Leukocyte Alkaline Phosphatase
Life Threatening Causes
Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.
Common Causes
- Aplastic anemia
- Chronic myelogenous leukemia
- Hypophosphatemia[4]
- Iron deficiency anemia
- Paroxysmal nocturnal hemoglobinuria
- Systemic lupus erythematosus[5][6][7][8][9]
Causes by Organ System
Causes in Alphabetical Order
References
- ↑ Brook J, Dreisbach PB (1977). "Leukocyte alkaline phosphatase levels in multiple myeloma". J Lab Clin Med. 90 (1): 114–7. PMID 406335.
- ↑ Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016
- ↑ Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X
- ↑ Gaasbeek, A.; Meinders, AE. (2005). "Hypophosphatemia: an update on its etiology and treatment". Am J Med. 118 (10): 1094–101. doi:10.1016/j.amjmed.2005.02.014. PMID 16194637. Unknown parameter
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ignored (help) - ↑ TANAKA, KR.; VALENTINE, WN.; FREDRICKS, RE. (1960). "Diseases or clinical conditions associated with low leukocyte alkaline phosphatase". N Engl J Med. 262: 912–8. doi:10.1056/NEJM196005052621804. PMID 13836802. Unknown parameter
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ignored (help) - ↑ Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016
- ↑ Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X
- ↑ 8.0 8.1 Sharma, SC. (1980). "Leucocyte alkaline phosphatase in neonatal infections". Postgrad Med J. 56 (657): 485–7. PMID 7443603. Unknown parameter
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ignored (help) - ↑ 9.0 9.1 Lokich, JJ. (1977). "Leukocyte alkaline phosphatase activity in patients with malignant disease". Cancer. 40 (3): 1202–5. PMID 902237. Unknown parameter
|month=
ignored (help)