title: Pseudohyperkalemia in patients with chronic lymphocytic leukemia.
abstract: Pseudohyperkalemia occurs occasionally in patients with extreme leukocytosis. Increased white blood cell fragility coupled with mechanical stress is felt to be causal. Serum and plasma potassium levels have been both associated with pseudohyperkalemia. Whole blood potassium determination will usually verify the correct diagnosis. It is important to diagnose this condition early so that patients are not inappropriately treated. Two patients with chronic lymphocytic leukemia and extreme leukocytosis are presented, one with pseudohyperkalemia and one with probable pseudohyperkalemia, and diagnostic considerations are discussed.
authors: Division of Nephrology, College of Medicine, University of South Florida, Tampa, FL 33606, USA.
authors: Stephen I
authors: SI
authors: Rifkin
references: Am J Nephrol. 1995;15(5):450-2
references: 7503149
references: Am J Kidney Dis. 2000 Nov;36(5):1049-53
references: 11054365
references: Am J Hematol. 2009 Sep;84(9):613-4
references: 19610017
references: Am J Med Sci. 2006 Jan;331(1):17-21
references: 16415658
references: J Lab Clin Med. 2006 Mar;147(3):139-44
references: 16503244
references: Clin J Am Soc Nephrol. 2008 Mar;3(2):324-30
references: 18235147
references: Am J Kidney Dis. 1986 Jun;7(6):461-5
references: 3717152
references: J Electrocardiol. 1999 Jan;32(1):45-9
references: 10037088
references: Am J Kidney Dis. 2006 Feb;47(2):373
references: 16431273
references: Ann Clin Biochem. 1996 Jan;33 ( Pt 1):89-91
references: 8929078
references: Intern Med. 2005 Aug;44(8):875-8
references: 16157991
references: Clin Chim Acta. 2008 Oct;396(1-2):95-6
references: 18638465
references: Kidney Int. 2010 Jan;77(2):167-8
references: 20040925
references: J Clin Oncol. 2008 Jun 1;26(16):2781-2
references: 18509189
references: Ann Clin Biochem. 2010 Jan;47(Pt 1):94-6
references: 19940199
references: Clin Chem Lab Med. 2009;47(7):880-1
references: 19575549
references: Clin Chem. 2008 Feb;54(2):449-51
references: 18223142
references: Am J Kidney Dis. 2005 Oct;46(4):746-8
references: 16183430
references: Ann Clin Biochem. 2001 Jul;38(Pt 4):386-90
references: 11471881