Case series | Volume 39, Article 194, 12 Jul 2021 | 10.11604/pamj.2021.39.194.28307

JAK2 p.(V617F) mutation in Tunisian myeloproliferative neoplasms and its genotype-phenotype correlation

Samia Menif, Hela Sassi, Safa Ben Ammar, Ahlem Farrah, Hend Ben Hadj Othmen, Hassiba Amouri

Corresponding author: Hela Sassi, Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University Tunis El Manar, 1002, Tunis, Tunisia

Received: 09 Feb 2021 - Accepted: 07 Apr 2021 - Published: 12 Jul 2021

Domain: Oncology

Keywords: Myeloproliferative neoplasms, polycythemia vera, essential thrombocythemia, primary myelofibrosis, JAK2 p.(V617F)

©Samia Menif et al. Pan African Medical Journal (ISSN: 1937-8688). This is an Open Access article distributed under the terms of the Creative Commons Attribution International 4.0 License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Cite this article: Samia Menif et al. JAK2 p.(V617F) mutation in Tunisian myeloproliferative neoplasms and its genotype-phenotype correlation. Pan African Medical Journal. 2021;39:194. [doi: 10.11604/pamj.2021.39.194.28307]

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Case series

JAK2 p.(V617F) mutation in Tunisian myeloproliferative neoplasms and its genotype-phenotype correlation

JAK2 p.(V617F) mutation in Tunisian myeloproliferative neoplasms and its genotype-phenotype correlation

Hela Sassi1,2,&, Samia Menif1,2, Safa Ben Ammar1,2, Ahlem Farrah1, Hend Ben Hadj Othmen1, Hassiba Amouri1


1Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University Tunis El Manar, 1002, Tunis, Tunisia, 2Faculty of Medicine of Tunis, University Tunis El Manar, 1006, Tunis, Tunisia



&Corresponding author
Hela Sassi, Laboratory of Molecular and Cellular Hematology, Pasteur Institute of Tunis, University Tunis El Manar, 1002, Tunis, Tunisia




Myeloproliferative neoplasms (MPNs) comprise polycythemia vera (PV), essential thrombocythemia (ET) and primary myelofibrosis (PMF). The relationship between JAK2 p.(V617F) mutation and MPNs was first described in 2005. The purpose of this study was to determine the prevalence of JAK2 p.(V617F) mutation in Tunisian patients assessed for MPNs and try to set a genotype-phenotype correlation. A retrospective study was conducted between January 2015 and April 2019. We collected the clinical data of all patients with MPNs suspicion or atypical splanchnic vein thrombosis (SVT). JAK2 p.(V617F) mutation was detected by allele specific real-time quantitative fluorescence PCR (AS-qPCR). We gathered 974 patients who underwent molecular analysis, 55.5% of them were male and 44.5% were female. The median age of all studied patients was 56 years. JAK2 p.(V617F) was found in 349 (35.8%) of total enrolled cases. It was reported in 44%, 37%, 29% and 25% of all patients diagnosed as having respectively ET, PV, PMF and atypical SVT. JAK2 p.(V617F) was negative in 62.2% of patients addressed for suspicion of PV. There was a significant positive correlation between the JAK2 p.(V617F) mutation status, age, gender, white blood cell counts and platelet counts. To our best knowledge, this is the first vast investigation of JAK2 p.(V617F) variant in Tunisia and North Africa with the lowest mutation rate in entire cohort and MPNs subgroups, underlying a specific presentation of this mutation. It is considered as an essential marker of MPNs diagnosis and prognosis and is associated with differences in the phenotype of these disorders, helpful for the follow-up of these patients.



Introduction    Down

Myeloproliferative neoplasms (MPNs) are a heterogeneous group of disorders which arise from genetically altered myeloid stem or progenitor cells. MPNs are characterized by an over production of mature myeloid cells. Classical MPNs have been classified into 3 entities: polycythemia vera (PV), essential thrombocythemia (ET) and primary myelofibrosis (PMF) [1]. It has long been recognized that these diseases are characterized by shared clinical, pathological and molecular features. All MPNs entities arise from a single somatically mutated stem cell that clonally expands and results in a single or multilineage hyperplasia.

The year 2005 was a watershed in understanding of the molecular pathogenesis of MPNs with the identification of an acquired recurrent somatic mutation in the Jak homology domain 2(JH2) of Janus kinase 2 (JAK2) gene in a significant proportion of patients with MPNs [2]. This variant represents single nucleotide substitution of G to T at nucleotide 1849 (c.1849G>T) in exon 14 of JAK2 gene, resulting in the substitution of Valine to Phenylalanine at codon 617 p.(V617F) [3]. This dominant gain of function mutation affects auto inhibitory JH2 pseudokinase domain of the JAK2 protein, leading to constitutive activation of JAK2 and JAK/STAT signaling pathway in the absence of ligands [4]. JAK2p.(V617F) is detected in 50-60% of ET and PMF patients and up to 97% of PV patients [5]. Infrequent occurrence of this mutation has been reported in acute leukemia, myelodysplasic syndrome (MDS) and atypical chronic myeloid leukemia [6]. In 2008, the world health organization (WHO) classification recognized the JAK2p.(V617F) mutation as a major criterion for the diagnosis of MPNs [7]. To our best knowledge, one Tunisian publication studied JAK2p.(V617F) mutations in a cohort of 45 patients [8]. The aim of this study is to report the prevalence of JAK2p.(V617F) mutation in MPNs Tunisian patients and try to set a genotype-phenotype correlation.



Methods Up    Down

Ethics statement: this study was approved by the regional committee for medical and health research ethics of Pasteur Institute of Tunis. Written informed consents were obtained from each patient for genetic analysis and publication. No commercial support was involved in this study. All data analyzed in this study are included in this article.

Study population: a retrospective study was conducted in the laboratory of hematology of Pasteur Institute of Tunis between January 2015 and April 2019. We included all the patients with clinical suspicion of MPN or atypical splanchnic vein thrombosis for whom JAK2 p.(V617F) was prescribed by a clinical hematologist. We gathered clinical information in the prescription of all screened patients: age, gender and the applied classification and diagnostic criteria proposed by the World Health Organization (WHO) in 2008 and the updated version 2016 relative to MPNs [9]. We excluded patients with incomplete clinical data.

Samples´ collection: blood samples were obtained after written informed consents from all included patients. Blood routine examination involved hemoglobin, white blood cell (WBC) counts and platelet counts.

JAK2 p.(V617F) mutation detection: DNA extraction was carried out from lymphocytes by QIAMP DNA mini-Kit (QIAGEN,Germany) according to the manufacturer´s protocol. DNA quality was assessed with the Nanodrop 2000 spectrophotometer (Thermo Fisher Scientific, Waltham, MA, USA) with an approved DNA concentration ranging between 100-200 ng/L and A260/A280 ratio between 1.8-2.

We performed an Allele specific real-time quantitative fluorescence PCR (AS-qPCR) using ipsogen JAK2 MutaSearch Kit, designed for the specific and quantitative determination of DNA copy number of JAK2p.(V617F) mutation and JAK2 wild type with respective primers [10]. p.(V617F) positive control (PC-V617F JAK2), negative control (NC-V617F JAK2), cut-off sample (COS-V617F JAK2) were provided by the kit. A 96-well plate qPCR device were used and all measures were analysed in duplicate. For one reaction, the mix contained 12,5 μL of TaqMan Universal PCR Master Mix, 1μL of specific primers and probe and 6.5 μL of H2O. Five μL of DNA samples were added to 20 μL of the corresponding qPCR premix well (V617F or WT).Five μL of each control and COS-V617F JAK2 were added in each corresponding 20 μL qPCR premix well. The following cycling conditions were run in the 7500 Sequence Detection System (ABI, Melbourne, Australia) to amplify in real time the increase in fluorescence generated: One cycle at 50C for 2 minutes of incubation, followed by a 10-minute incubation at 95C, then 50 cycles at 95C (15 seconds), and an extension step at 63C (1 minute). The point at which the fluorescent signal rises above the background called crossing threshold (CT), is directly proportional to the quantity of starting DNA. The average CT value obtained (CT V617F and CT WT) for each sample (controls, cut-off sample and patients samples) were calculated. The load limit verified that the patient DNA sample used for the test has been correctly manipulated to ensure the reliability of the final results for JAK2 V617F status. Then we calculated the ΔCT value for all valid samples (ΔCT Sample) and controls (ΔCT PC- V617F, ΔCT NC- V617F, and ΔCT COS) in order to obtain the ΔΔCT value for each patient sample (ΔΔCT Sample) and each control (ΔΔCT PC- V617F and ΔΔCT NC- V617F). The JAK2 V617F mutation was detected if ΔΔCT Sample > + ΔCT COS x 0.07 and was absent if ΔΔCT Sample < - ΔCT COS x 0.07.

Statistical analysis: descriptive and comparative statistical analysis were performed using the statistical package SPSS for windows, version 16. The tests used for comparison of qualitative variables were Chi-squared test (χ2 test). The tests used for comparison of distributions of quantitative variables were Student's T test and Mann-Whitney U test. The degree of significance "p" retained for all the tests was 0.05.

Ethics in publishing: this study was approved by the regional committee for medical and health research ethics of Pasteur Institute of Tunis.



Results Up    Down

Population basic characteristics: we tested 974 Tunisian patients for JAK2p.(V617F) mutation with clinical suspicion of MPN or a typical splanchnic vein thrombosis. The median age of all studied patients was 56 years with extremes ranging from 1 to 90 years and M/F sex-ratio was 541/433. From the total studied population, the MPNs were divided into: 29.4% (286/974) PV, 28.2% (275/974) ET and 9.2% (89/974) PMF. Unclassified MPNs were found in 25.5 % (249/974) of all cases and 7,7% (75/974) patients were addressed for SVT. We did not report any secondary polycythemia. The clinical and biological characteristics in all tested Tunisian patients are summarized in Table 1.

Genotype-phenotype correlation: JAK2p.(V617F) mutation was detected in 349 of all 974 patients (35.8 %). JAK2 p.(V617F) was found in 44% (121/275), 37.8% (108/286), 30.1% (75/249), 29.2% (26/89) and 25.3% (19/75) of patients diagnosed with ET, PV, Unclassified MPNs, PMF and thrombosis respectively. The SVT subgroup were carriers of JAK2p.(V617F) mutation despite the absence of overts signs of MPNs. We compared the subgroup with m utant variant to wild type subgroup and found a statistically significant difference in the distribution of age and sex ratio (p= 0.000) (Table 1). Mean age was significantly higher with JAK2p.(V617F) mutation in total cohort, three subgroups of MPNs and unclassified MPNs (p=0.000-0.032) (Table 1, Table 2) except in SVT cohort (p=0.856). Age distribution depending on the status of JAK2 in the different subgroups is represented on Figure 1.

Men were more concerned with PV (p<0.001) than women who were more prevalent with PMF clinical phenotype (14.9% vs 12.9%; p<0.001) and ET phenotype (60.2% vs 29.6%; p<0.001) (Figure 2). In JAK2 wild type subgroup, the sex presentation was significant (p<0.001) where PV phenotype (63.2% vs 14.9%) was more common in men than women whereas ET (66.9% vs 22.3%) and PMF (18.2% vs 14.5%) phenotypes were more reported in women than men (Figure 2). In patients bearing JAK2p.(V617F), the sex repartition was not significant (p= 0.2-0.24): women were more common to have ET (53.9% vs 40.8%) and PMF (11.5% vs 8.8%) phenotypes while men tend to have more PV phenotype (50.4% vs 34.6%) (Figure 2). JAK2p.(V617F) was associated with a meaningfully higher level in WBC and platelet counts (p= 0.000). There was no significant correlation between the JAK2 mutational status and hemoglobin levels (p=0.150) (Table 1).

In PV cohort, we noticed that patients with JAK2p.(V617F) had significantly higher mean age (p=0.000) and higher platelet counts (p=0.000) than in wild type group. Men were more concerned with JAK2 wild type (p=0.000) (Table 2). In ET, PMF and SVT subgroups, the mutational status showed no significant correlation with gender, mean levels of hemoglobin, WBC and platelet counts (Table 2). The mutant status in unclassified MPNs presented a higher level of hemoglobin, statistically significant (p=0.007).



Discussion Up    Down

In the present study, we determined the prevalence of JAK2 p.(V617F) mutation in the first large Tunisian patients cohort examined for suspected MPNs or SVT. We also investigated the relationship between this mutation and its influence in hemogram variation in 974 patients divided into different subgroups of MPNs.

Myeloproliferative neoplasms mainly occur in adults and only infrequently in children [11]. Patients with MPNs experience a chronic disease with an insidious onset that often lasts many years, during which they may variably progress to acute leukemia or bone marrow failure [12]. The identification of JAK2 p.(V617F) mutation is central to the diagnosis of a clonal process and exclusion of non-neoplastic disorders [13]. In 2008, WHO classification mentioned the positivity of the recurrent somatic mutation in exon 14 of JAK2 gene, as a major criterion of MPNs´ diagnosis specifically ET, PV and PMF. It is detected in around 50-60% of ET and PMF patients and in more than 95% of patients with PV [14].

In this Tunisian study, JAK2 p.(V617F) mutation was detected in around 35.8 % of all enrolled patients, 44% of ET, decreasing the distribution of this mutation between PV and ET accounting for 37.8% of PV and 29.2% of PMF. It is striking that as many as 62% of those with PV were JAK2 p.(V617F) negative [15-27] (Table 3), as this was inconsistent with findings in international literature where less than 3% was reported [28]. We managed to compare these rates with large studies (n>200) of different populations ethnicity. Interestingly, to our best knowledge, we found that Tunisian patients have the lowest mutation rate of JAK2 p.(V617F) in all cohorts and their different subgroups of MPNs [15-27] (Table 3). This could be explained by different sizes of cohorts, several ethnics, single nucleotide polymorphism or environment factors [29].

Nineteen patients with SVT were positive for JAK2 p.(V617F) mutation. These results support the previous view that routine screening of this mutation appears to be indicated in the presence of SVT [30]. Many studies focused on the correlation between the JAK2p.(V617F) mutant status, age, gender, white blood cell counts and platelet counts in different MPNs groups [15-27] (Table 3). The mean age in 974 enrolled patients and in MPNs groups was comparable with literature publications and patients with JAK2p.(V617F) mutation are more elder in MPN groups which is conform to recent reports [15-27] (Table 3). Gender specific presentation was raised. Our results were similar to the recent large study of Karantanos et al. (2020) in term of women predominance in ET and men in PV independantly of JAK2p.(V617F) status but contrasting in PMF where they found more men related to this phenotype (p=0.001) [31]. In their JAK2 mutant subgroup, we did not established a correlation while their women present more ET and their men more PMF (p=0.001) [31]. In wild type subgroup, our gender presentation was opposite to their results for PMF phenotype (p=5.042) [31].

In MPNs subgroups, JAK2 p.(V617F) mutation rate was related with variations in hemoglobins, WBC and platelet counts compared with other populations [15-27] (Table 3). Regarding PV cohort, Tunisians had the lowest hemoglobin rate. WBC counts were comparable to Egyptian and Japanese studies [15, 16]. Average platelet counts was among studies with highest rates [16-18]. In ET subgroup, WBC counts in Tunisians were common to Egyptian and Indian findings [15, 19]. As for PV cohort, same conclusion concerning average platelet counts, close to values of Indian, Egyptian and South Korean studies [15, 25, 26]. Relating to PMF subtype, WBC and platelet averages were within the ranges reported in literature but our series had the lowest hemoglobin level [15-27] (Table 3).

Polycythemia is a collective designation for disorders with elevated haematocrit and a distinction is made between absolute and relative polycythemias [32]. Secondary polycythemia are absolute polycythemias that are often due to hypoxia related to underlying heart and lung disease, which was not reported in this study [33]. ET is characterized by an increased platelet count with a megakaryocytic hyperplasia, whereas PMF is a more heterogeneous disorder both by its clinical and biological characteristics, defined by the presence of bone marrow fibrosis and megakaryocytic hyperplasia [34, 35]. In many cases, a continuous between these disease subtypes can be observed, as documented by the progression of ET and PV to secondary myelofibrosis. Boundaries between these disorders cannot be well established and precise diagnosis at disease onset is often challenging. The use of allele specific real-time quantitative fluorescence PCR has significantly increased our ability to detect small amount of mutated clones [36].

Despite advances in understanding MPNs biology, an important fundamental question of how the same genetic event can be associated with distinct clinical phenotypes remains unresolved, as it is for JAK2 p.(V617F) mutation. The mutational landscape in MPN is much more complex than initially thought [37]. A combination of multiple genetic mutations and a complex interplay of inherited genetic modifiers are likely to be of substantial importance, followed by gender, age and microenvironment disruption [29]. In our large cohort, the allele specific real-time quantitative fluorescence PCR in JAK2 p.(V617F) was informative. However, our study suffers from limitations and bias since we only search for JAK2 p.(V617F). We should consider these data in MPN with caution since JAK2 mutation in exon 12, MPL and CALR mutations were not investigated and further additional studies should test them in the large proportion of the JAK2 negative patients.



Conclusion Up    Down

From our first large study on Tunisian patients with MPNs and SVT, we have settled the prevalence of JAK2p.(V617F) mutation in our population and found the lowest mutation rate of this variant in all broad cohorts. Unbalanced rates in different subgroups of MPNs were highlighted. The allele-specific quantitative real-time fluorescence PCR in JAK2p.(V617F) keeps its place in routine. The clinical and biological characteristics established in this study could be helpful for the clinicians during the diagnosis and the follow-up of MPNs patients. Furthermore, we must also refine the mutational spectrum of MPNs in Tunisia with additional studies of others driver mutations.

What is known about this topic

  • Molecular genetics is a cornerstone in the diagnosis and follow-up of MPN subgroups.

What this study adds

  • This is the first large retrospective study from Tunisia that provides an overview on clinical and biological characteristics in JAK2 p.(V617F) carriers addressed for suspected MPNs or SVT;
  • The lowest rate in JAK2 p.(V617F) mutation (35.8%) was reported in Tunisia in total cohort with 37.8% in PV, uncommon with previous studies.



Competing interests Up    Down

The authors declare no competing interests.



Authors' contributions Up    Down

Guarantor of integrity of the entire study: Samia Menif (MD), Hela Sassi (MD). Study concepts and design: Samia Menif (MD). Literature research: Samia Menif (MD), Hela Sassi (MD). Clinical studies: Samia Menif (MD), Safa Ben Ammar (MD). Experimental studies: Ahlem Farrah (MD), Hend Ben Hadj Othmen (MD), Hassiba Amouri (MD). Data analysis: Hela Sassi (MD), Samia Menif (MD). Statistical analysis: Hela Sassi (MD). Manuscript preparation: Samia Menif (MD), Hela Sassi (MD). Manuscript editing: Samia Menif (MD), Hela Sassi (MD). All authors read and approved the final version of this manuscript.



Acknowledgments Up    Down

We are grateful to all Tunisian clinician hematologists who referred their patients to our department and thankful for all patients´ participation. Special thanks to editors and reviewers for their recommendations and corrections.



Tables and figures Up    Down

Table 1: basic clinical and hematological characteristics in negative and positive JAK2p.(V617F) mutation in all tested Tunisian patients

Table 2: genotype-phenotype correlation in the different subgroups of myeloproliferative neoplasms in Tunisia

Table 3: associations of JAK2 p.(V617F) mutation with hemogram variations in different subgroups of myeloproliferative neoplasms in some reported studies and Tunisian patients

Figure 1: age distribution in wild type and mutant JAK2 subgroups

Figure 2: sex-specific differences in Tunisian cohort and wild type or mutant JAK2 subgroups



References Up    Down

  1. Fowlkes S, Murray C, Fulford A, De Gelder T, Siddiq N. Myeloproliferative neoplasms (MPNs) - Part 1: An overview of the diagnosis and treatment of the classical MPNs. Can Oncol Nurs J. 2018;28(4):262-268. PubMed | Google Scholar

  2. Kralovics R, Passamonti F, Buser AS, Teo SS, Tiedt R, Passweg JR et al. A Gain-of-Function Mutation of JAK2 in Myeloproliferative Disorders. N Engl J Med. 2005;352(17):1779-1790. PubMed | Google Scholar

  3. Walz C, Crowley BJ, Hudon HE, Gramlich JL, Neuberg DS, Podar K et al. Activated Jak2 with the V617F Point Mutation Promotes G 1 /S Phase Transition. J Biol Chem. 2006;281(26):18177-1818. PubMed | Google Scholar

  4. Rampal R, Al-Shahrour F, Abdel-Wahab O, Patel JP, Brunel JP, Mermel CH et al. Integrated genomic analysis illustrates the central role of JAK-STAT pathway activation in myeloproliferative neoplasm pathogenesis. Blood. 2014;123(22):e123-e133. PubMed | Google Scholar

  5. Tefferi A, Gilliland DG. The JAK2V617F Tyrosine Kinase Mutation in Myeloproliferative Disorders: Status Report and Immediate Implications for Disease Classification and Diagnosis. Mayo Clin Proc. 2005 Jul;80(7):947-58. PubMed | Google Scholar

  6. Levine RL. The JAK2V617F activating mutation occurs in chronic myelomonocytic leukemia and acute myeloid leukemia, but not in acute lymphoblastic leukemia or chronic lymphocytic leukemia. Blood. 2005;106(10):3377-3379. PubMed | Google Scholar

  7. Kvasnicka HM, Thiele J. Prodromal myeloproliferative neoplasms: The 2008 WHO classification. Am J Hematol. 2010 Jan;85(1):62-9. PubMed | Google Scholar

  8. Mahjoub S, Baccouche H, Sahnoun M, Kaabi H, Manai Z, Slama H, Ben Romdhane N. The JAK2 mutation in myeloproliferative neoplasms: a predictive factor of thrombosis. Tunis Med. 2015 Jul;93(7):474-7. PubMed | Google Scholar

  9. Barbui T, Thiele J, Gisslinger H, Finazzi G, Vannucchi AM, Tefferi A. The 2016 revision of WHO classification of myeloproliferative neoplasms: Clinical and molecular advances. Blood Rev. 2016;30(6):453-45. PubMed | Google Scholar

  10. Baxter EJ, Scott LM, Campbell PJ, East C, Fourouclas N, Swanton S et al. Acquired mutation of the tyrosine kinase JAK2 in human myeloproliferative disorders. The Lancet. 2005;365(9464):1054-1061. PubMed | Google Scholar

  11. Meier B, Burton JH. Myeloproliferative Disorders. Hematol Oncol Clin North Am. 2017;31(6):1029-1044. PubMed | Google Scholar

  12. Tefferi A, Gilliland DG. Oncogenes in Myeloproliferative Disorders. Cell Cycle. 2007;6(5):550-566. PubMed | Google Scholar

  13. Levine RL, Gilliland DG. JAK-2 mutations and their relevance to myeloproliferative disease. Curr Opin Hematol. 2007;14(1):43-47. PubMed | Google Scholar

  14. Tefferi A. Classification, Diagnosis and Management of Myeloproliferative Disorders in the JAK2V617F era. Hematology Am Soc Hematol Educ Program. 2006;240-5. PubMed | Google Scholar

  15. Soliman EA, El-Ghlban S, El-Aziz SA, Abdelaleem A, Shamaa S, Abdel-Ghaffar H. JAK2, CALR, and MPL Mutations in Egyptian Patients With Classic Philadelphia-negative Myeloproliferative Neoplasms. Clin Lymphoma Myeloma Leuk. 2020 Oct;20(10):e645-e651. PubMed | Google Scholar

  16. Misawa K, Yasuda H, Araki M, Ochiai T, Morishita S, Shirane S et al. Mutational subtypes of JAK2 and CALR correlate with different clinical features in Japanese patients with myeloproliferative neoplasms. Int J Hematol. 2018;107(6):673-680. PubMed | Google Scholar

  17. Syeed N. JAK2 and Beyond: Mutational Study of JAK2V617 in Myeloproliferative Disorders and Haematological Malignancies in Kashmiri population. Asian Pac J Cancer Prev. 2019;20(12):3611-3615. PubMed | Google Scholar

  18. Lang T, Nie Y, Wang Z, Huang Q, An L, Wang Y et al. Correlation analysis between JAK2 , MPL , and CALR mutations in patients with myeloproliferative neoplasms of Chinese Uygur and Han nationality and their clinical characteristics. J Int Med Res. 2018;46(11):4650-4659. PubMed | Google Scholar

  19. Rabade N, Subramanian P, Kodgule R, Raval G, Joshi S, Chaudhary S et al. Molecular genetics of BCR-ABL1 negative myeloproliferative neoplasms in India. Indian J Pathol Microbiol. 2018;61(2):209. PubMed | Google Scholar

  20. Gángó A, Mózes R, Boha Z, Kajtár B, Timár B, Király PA et al. Quantitative assessment of JAK2 V617F and CALR mutations in Philadelphia negative myeloproliferative neoplasms. Leuk Res. 2018 Feb;65:42-48. PubMed | Google Scholar

  21. Ojeda MJ, Bragós IM, Calvo KL, Williams GM, Carbonell MM, Pratti AF. CALR , JAK2 and MPL mutation status in Argentinean patients with BCR-ABL1 - negative myeloproliferative neoplasms. Hematology. 2018;23(4):208-211. PubMed | Google Scholar

  22. Singdong R, Siriboonpiputtana T, Chareonsirisuthigul T, Kongruang A, Limsuwanachot N, Sirirat T et al. Characterization and Prognosis Significance of JAK2 (V617F), MPL, and CALR Mutations in Philadelphia-Negative Myeloproliferative Neoplasms. Asian Pac J Cancer Prev. 2016 Oct 1;17(10):4647-4653. PubMed | Google Scholar

  23. Kim SY, Im K, Park SN, Kwon J, Kim J-A, Lee DS. CALR, JAK2, and MPL Mutation Profiles in Patients With Four Different Subtypes of Myeloproliferative Neoplasms. Am J Clin Pathol. 2015;143(5):635-644. PubMed | Google Scholar

  24. Andrikovics H, Krahling T, Balassa K, Halm G, Bors A, Koszarska M et al. Distinct clinical characteristics of myeloproliferative neoplasms with calreticulin mutations. Haematologica. 2014;99(7):1184-1190. PubMed | Google Scholar

  25. Ha J-S, Kim Y-K, Jung S-I, Jung H-R, Chung I-S. Correlations between Janus Kinase 2 V617F Allele Burdens and Clinicohematologic Parameters in Myeloproliferative Neoplasms. Ann Lab Med. 2012;32(6):385. PubMed | Google Scholar

  26. Sazawal S, Bajaj J, Chikkara S, Jain S, Bhargava R, Mahapatra M. Prevalence of JAK2 V617F mutation in Indian patients with chronic. Indian J Med Res. 2010 Oct;132:423-7. PubMed | Google Scholar

  27. Benmoussa A, Dehbi H, Fehri S, Quessar A, Nadifi S. JAK2-V617F mutation in Moroccan patients with myeloproliferative disorders: Contribution, diagnosis and therapeutic prospects. Pathol Biol. 2011;59(4):e89-e92. PubMed | Google Scholar

  28. Rossi D, Cortini F, Deambrogi C, Barbieri C, Cerri M, Franceschetti S et al. Usefulness of JAK2V617F mutation in distinguishing idiopathic erythrocytosis from polycythemia vera. Leuk Res. 2007;31(1):97-101. PubMed | Google Scholar

  29. O´Sullivan J, Mead AJ. Heterogeneity in myeloproliferative neoplasms: Causes and consequences. Adv Biol Regul. 2019;71:55-68. PubMed | Google Scholar

  30. Sarid N, Eshel R, Rahamim E, Carmiel M, Kirgner I, Shpringer M et al. JAK2 mutation: an aid in the diagnosis of occult myeloproliferative neoplasms in patients with major intraabdominal vein thrombosis and normal blood counts. Isr Med Assoc J. 2013;15(11):698-700. PubMed | Google Scholar

  31. Karantanos T, Chaturvedi S, Braunstein EM, Spivak J, Resar L, Karanika S et al. Sex determines the presentation and outcomes in MPN and is related to sex-specific differences in the mutational burden. Blood Adv. 2020;4(12):2567-2576. PubMed | Google Scholar

  32. Ganly P, Hanrahan V, Baker B, Romeril K. Identification of JAK2V617F in patients with polycythemia is highly correlated with conventional criteria for diagnosis of polycythemia vera. Am J Hematol. 2007;82(1):80-82. PubMed | Google Scholar

  33. McMullin MFF, Mead AJ, Ali S et al. A guideline for the management of specific situations in polycythaemia vera and secondary erythrocytosis: A British Society for Haematology Guideline. Br J Haematol. 2019;184(2):161-175. PubMed | Google Scholar

  34. Schafer AI. Molecular basis of the diagnosis and treatment of polycythemia vera and essential thrombocythemia. Blood. 2006;107(11):4214-4222. PubMed | Google Scholar

  35. Tefferi A. Primary myelofibrosis: 2019 update on diagnosis, risk-stratification and management. Am J Hematol. 2018;93(12):1551-1560. PubMed | Google Scholar

  36. Passamonti F, Mora B, Barraco D, Maffioli M. Post-ET and Post-PV Myelofibrosis: Updates on a Distinct Prognosis from Primary Myelofibrosis. Curr Hematol Malig Rep. 2018;13(3):173-182. PubMed | Google Scholar

  37. Mina AA, Stein B. Next-Generation Sequencing in Myeloproliferative Neoplasms: Is This Indicated in All Patients? Curr Hematol Malig Rep. 2019;14(3):137-144. PubMed | Google Scholar






























Case series

JAK2 p.(V617F) mutation in Tunisian myeloproliferative neoplasms and its genotype-phenotype correlation

Case series

JAK2 p.(V617F) mutation in Tunisian myeloproliferative neoplasms and its genotype-phenotype correlation

Case series

JAK2 p.(V617F) mutation in Tunisian myeloproliferative neoplasms and its genotype-phenotype correlation

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Myeloproliferative neoplasms

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Primary myelofibrosis

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