Ann Lab Med.  2020 Jul;40(4):341-344. 10.3343/alm.2020.40.4.341.

Thrombocythemia 1 With THPO Variant (c.13+1G>A) Diagnosed Using Targeted Exome Sequencing: First Case in Korea

Affiliations
  • 1Department of Pediatrics, Keimyung University School of Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea. yejeeshim@dsmc.or.kr
  • 2Department of Laboratory Medicine, Keimyung University School of Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea.

Abstract

No abstract available.


MeSH Terms

Exome*
Korea*
Thrombocytosis*

Figure

  • Fig. 1 Clinical features of the thrombocythemia 1 patient. (A) Constricted left hand. (B) Radiographs showing the limb defects of his left hand (missing distal phalanges at digits 2–5) and his normal right hand. (C) Change in the CBC over time. (D) Bone marrow aspirate showing increased megakaryocytes in active form (Wright-Giemsa stain, ×100). (E) Sanger sequencing of THPO in the patients and family members. The red square indicates the position of NM_000460.2: c.13+1G. (F) Pedigree of the family with thrombocythemia 1 and laboratory results. The patient is indicated with an arrow. The filled symbols represent individuals with THPO gene variant. Open symbols represent normal individuals. The individuals are indicated above the corresponding lanes. Age, CBC, serum THPO level (reference value, 7 – 99 pg/mL), and THPO variant are shown. Abbreviations: CBC, complete blood count; THPO, thrombopoietin; F, forward strand; R, reverse strand; Hb, hemoglobin; WBC, white blood cells; PLT, platelets.


Reference

1. Graziano C, Carone S, Panza E, Marino F, Magini P, Romeo G, et al. Association of hereditary thrombocythemia and distal limb defects with a thrombopoietin gene mutation. Blood. 2009; 114:1655–1657.
Article
2. Zhang B, Ng D, Jones C, Oh ST, Nolan GP, Salehi S, et al. A novel splice donor mutation in the thrombopoietin gene leads to exon 2 skipping in a Filipino family with hereditary thrombocythemia. Blood. 2011; 118:6988–6990.
Article
3. Schlemper RJ, van der Maas AP, Eikenboom JC. Familial essential thrombocythemia: clinical characteristics of 11 cases in one family. Ann Hematol. 1994; 68:153–158.
Article
4. Wiestner A, Schlemper RJ, van der Maas AP, Skoda RC. An activating splice donor mutation in the thrombopoietin gene causes hereditary thrombocythaemia. Nat Genet. 1998; 18:49–52.
Article
5. Kondo T, Okabe M, Sanada M, Kurosawa M, Suzuki S, Kobayashi M, et al. Familial essential thrombocythemia associated with one-base deletion in the 5′-untranslated region of the thrombopoietin gene. Blood. 1998; 92:1091–1096.
6. Ghilardi N, Wiestner A, Kikuchi M, Ohsaka A, Skoda RC. Hereditary thrombocythaemia in a Japanese family is caused by a novel point mutation in the thrombopoietin gene. Br J Haematol. 1999; 107:310–316.
Article
7. Liu K, Kralovics R, Rudzki Z, Grabowska B, Buser AS, Olcaydu D, et al. A de novo splice donor mutation in the thrombopoietin gene causes hereditary thrombocythemia in a Polish family. Haematologica. 2008; 93:706–714.
Article
8. Stockklausner C, Echner N, Klotter AC, Hegenbart U, Dreger P, Kulozik AE. Hereditary thrombocythemia caused by a thrombopoietin (THPO) gain-of-function mutation associated with multiple myeloma and congenital limb defects. Ann Hematol. 2012; 91:1129–1133.
Article
9. Hitchcock IS, Kaushansky K. Thrombopoietin from beginning to end. Br J Haematol. 2014; 165:259–268.
Article
10. Kuter DJ. The biology of thrombopoietin and thrombopoietin receptor agonists. Int J Hematol. 2013; 98:10–23.
Article
Full Text Links
  • ALM
Actions
Cited
CITED
export Copy
Close
Share
  • Twitter
  • Facebook
Similar articles
Copyright © 2024 by Korean Association of Medical Journal Editors. All rights reserved.     E-mail: koreamed@kamje.or.kr