Minimal residual disease after allogeneic bone marrow transplantation for chronic myeloid leukaemia: A metaphase-FISH study

Wa'el El-Rifai, Tapani Ruutu, Kim Vettenranta, Samia Temtamy, Sakari Knuutila

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Metaphase-FISH was adopted for the detection of proliferating Philadelphia-positive (Ph+) residual leukaemic cells in 25 patients with chronic myeloid leukaemia treated with allogeneic bone marrow transplantation (BMT). Patients were followed up during their clinical remission for 4-50 months (median 17 months) after BMT. 80 bone marrow samples were studied. For most of the cases no fewer than 1000 metaphases were analysed. Six patients (24%) showed residual Ph+ cells during the first 6 months and two others by the end of the first year after BMT. Three patients relapsed during the study and in two of them residual Ph+ cells were detected during the first 6 months after BMT. In 17 patients no Ph+ cells were detected at any stage of follow-up and 16 (94.1%) of them continue in complete clinical and haematological remission. Our results indicate that metaphase-FISH is a reliable tool in the quantitation of proliferating residual leukaemic cells. We suggest that consecutive findings of equal amounts of residual leukaemic cells do not necessarily predict a relapse. However, their presence calls for follow-up at shorter intervals where an increasing number of these cells predicts an ensuing relapse.

Original languageEnglish (US)
Pages (from-to)365-369
Number of pages5
JournalBritish Journal of Haematology
Volume92
Issue number2
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

Keywords

  • Chronic myeloid leukaemia
  • Minimal residual disease
  • Nuorescence in situ hybridization

ASJC Scopus subject areas

  • Hematology

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