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Table 1 Published case reports on rPPK and relevant patient characteristics

From: Reverse pseudohyperkalemia in a newly diagnosed pediatric patient with acute T-cell leukemia and hyperleukocytosis: a case report and literature review

 

Year

Author

Diagnosis

Age (year)

Causes of rPHK

Plasma K mEq/L

Serum K mEq/L

K in blood gas (whole blood)

WBC × 109/L

Platelet × 109/L

Creatinine

mg/dL

TLS

ECG

1

1997

Singh [1]

CLL

70

NA

7

3.6

 

524

 

1.4–1.7

  

2

2008

Boban [14]

CLL

49 female

heparin-mediated cell membrane damage during processing and centrifugation

10.7–11.2

2.7

2.6

369

100

No AKI

No

No abnormality

3

2011

Garwicz[23]

T cell ALL

2 year and 10 m

1-mechanical forces during sampling

2- heparin-induced membrane damage

5.6–11.6

NA

3.7

391

86

NA

NA

Normal

4

2011

Meng[15]

CLL

86 female

1-Heparin-induced cell membrane damage

2- higher consumption of metabolic fuels that lead to impaired Na/K ATPase pump activity resulting in release of potassium

7.5(lithium heparin plasma 76 units HEPARIN)

4.7

9.7 Lithium–heparin venous

Whole blood (tube)

4.3 Venous whole blood (balanced

lithium–heparin syringe)

374

158

84

LDH 382 U/L

Prolonged QT

5

2012

Garwicz [9]

CLL

76 male

Mechanical forces acting on the membranes of fragile leukemic cells during pneumatic tube transport of lithium heparin plasma samples

Leukemic cells undergo lysis in vitro, releasing potassium

and ATP to the plasma

7.3

4.8

NA

421

Normal

Normal

None

NA

6

2014

Avelar [16]

CLL

78 male

Sensitivity to heparin-mediated cell membrane damage during processing and centrifugation

8.4

4.4

NA

206

158

1.4

Uric acid, 10.6 mg/dL

calcium, 8.4 mg/dL

phosphorus, 4.7 mg/dL

Normal

7

2015

Mansoor [17]

CLL

49 male

1-Fragility of malignant cells that Makes them prone to lysis

2-High consumption of metabolic fuels by leukemic cells that lead to impaired Na + /K + ATPase pump activity, resulting in potassium release

9.4 (pneumatic transport)

4.2 manual transport

3.7 (manual transport)

3.7

545

47

1.48

Uric

acid of 6.4 mg/dL

lactate dehydrogenase of

1746 units/L

Normal

8

2016

Huang[13]

CLL

83 male

Mechanical stress on chronic lymphocytic leukemia cells

7.4 (pneumatic transport)

3.1( hand-carried)

NA

3.4 (ABG syringe hand- carried to lab)

300

NA

NA

LDH 328

No evidence of TLS

Normal

9

2017

Li-Ting Juan [18]

ALL

61 male

Sensitivity of fragile leukemic cell membrane to heparin

Potassium and LDH levels in plasma were both higher

than those measured in serum

6.7–12.2

1.9–2.2

NA

480

45

Normal

Plasma LDH 840 U/L

serum LDH 653 U/L

No hyperkalemia changes

10

2020

Moreno [24]

B-cell NHL

65 male

Heparin induced lysis of WBCs leading to release of ATP that promotes active transport of potassium Out of lymphocytes and influx of Na intracellularly

 > 10

plasma Na 123

4.9

serum Na 139

NA

263

55

Normal

None

NA

11

2020

Fresa A [19]

Atypical CLL

81 male

Pathological cells could have undergone death due to the exhaustion of the substrates necessary for survival, due in turn to the extreme hyperleukocytosis of the patient

7.5

3(Dx 81 mg/dl)

8.6 (Dx10mg/dl)

NA

Low ( NA)

423.7

82

NA

LDH 2239 U/L

Normal

12

2020

Shamy [20]

Non sever leukocytosis cases

11 HM

34 NHM

(0–94 years) male and female

7 cases < 1 years

1-heparin-induced WBC membrane damage

2-leukocyte-induced consumption of

metabolic fuels with resultant inhibition of the sodium pump

(Nafl/Kfl-ATPase) and subsequent potassium release

5.5–6.6

4.0–5.2

NA

6.5–19.7

128–302

0.7–2.8

NA

All normal except one with peaked T wave

13

2020

Ahmed[21]

NA ? CLL

60 male

1-Fragile leukemic cells during the clotting process

2-Severe leukocytosis leads to consumption of metabolic fuels that an impair Na–K ATPase activity, leading to release of potassium from a large number of white blood cells

3-Damage to the membrane of the millions of fragile malignant cells by the heparin in the tubes

6.2

3.5

 

440

NA

0.7

No

Normal

14

2020

Jafar [22]

CLL

67 woman

1-Fragile leukocyte especially with pneumatic transport

2-high metabolic fuel demand by malignant cells, causing depletion of ATP, which leads to dysfunction of the Na–K ATPase pump that normally helps keep potassium intracellular

3-Heparin induce membrane damage

5.6

4

4.3

161

NA

0.9

Creatine kinase 43 U/L, LDH 177 U/L, phosphorus level of 4.5 mg/dL uric acid 6.4 mg/dL,

Normal

  1. ALL; acute lymphoblastic leukemia, CLL; chronic lymphocytic leukemia, NHL; non-Hodgkin lymphoma, HM; hematological malignancy, NHM; non-hematological malignancy