A Case with Pyruvate Kinase Deficiency Remarkably Sensitive to Heat

Tekin Aksu, Neşe Yarali, Elisa Fermo, Anna Marcello, Şadan Hacisalihoǧlu, Paola Bianchi, Namik Y. Özbek

Research output: Contribution to journalArticle


Pyruvate kinase (PK) deficiency is the most common defect of the glycolytic pathway leading to congenital hemolytic anemia. We present the case of an 18-year-old boy with chronic nonspherocytic hemolytic anemia, who had remarkable sensitivity to heat. Moreover, the patient showed clinical impairment in the last year. For this reason, we excluded the immunologic or infectious nature (malaria, babesia), which may play a role in the worsening of anemia. Red blood cell enzyme assay showed the presence of a significant increase in other enzyme activities, except for PK, suggesting a PK deficiency in the patient. The molecular analysis of the PK-LR gene revealed the presence of a novel homozygote missense mutation (c.581G>C, p.Arg194Pro). The mutant enzyme displayed heat instability. In addition, we analyzed bilirubin uridine diphosphate (UDP)-glucuronosyltransferase 1A1 gene that revealed a heterozygous state ([TA]6/[TA]7). After a clear diagnosis of PK deficiency, the patient underwent splenectomy. ©

Original languageEnglish
Pages (from-to)e458-e460
JournalJournal of Pediatric Hematology/Oncology
Issue number7
Publication statusPublished - Oct 1 2018


  • pyruvate kinase deficiency
  • red cell enzyme abnormalities
  • thermolabile enzyme

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Hematology
  • Oncology

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