Effects and serum levels of thrombopoietin in a case of chronic thrombocytopenia with achondroplasia

Akira Ishiguro*, Tatsutoshi Nakahata, Kenji Muraoka, Tahara Tomoyuki Tahara, Hiroshi Miyazaki, Takashi Kato, Yuji Inaba, Toshikazu Shimbo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Thrombopoietin (TPO), produced mainly in the liver, is a major regulator of platelet production. Serum TPO levels are generally increased in thrombocytopenia. We report a case of a 12-year-old boy with chronic severe thrombocytopenia, achondroplasia and nephritis. Severe chronic thrombocytopenia was found at 9 months of age. It was resistant to any treatment. Studies on megakaryocytic colonies in vitro revealed that the marrow cells responded well to TPO and no plasma inhibitor was found. Although hepatic function test results were normal, serum TPO levels in the patient (0.94 fmol/ml) were consistent with those in age-matched children (0.49 1.75 fmol/ml). Chronic thrombocytopenia requires individual evaluation before clinical trials with TPO.

Original languageEnglish
Pages (from-to)99-102
Number of pages4
JournalInternational Journal of Hematology
Issue number1
Publication statusPublished - 1997 Jul
Externally publishedYes


  • Achondroplasia
  • Megakaryocyte
  • Platelet
  • Thrombocytopenia
  • Thrombopoietin

ASJC Scopus subject areas

  • Hematology


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