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Korean J Lab Med. 2009 Aug;29(4):277-281. English. Case Report.
Goh RY , Cho SS , Song YJ , Heo K , Oh SY , Kim SH , Kwon HC , Kim HJ , Han JY .
Department of Laboratory Medicine, Dong-A University College of Medicine, Busan, Korea.
Department of Internal Medicine, Dong-A University College of Medicine, Busan, Korea.

Chimerism testing permits early prediction and documentation of successful engraftment, and also facilitates detection of impending graft rejection. In this study, we serially monitored chimerism status by short tandem repeat-based PCR in nucleated cells (NC), T cells and natural killer (NK) cells after myeloablative allogeneic stem cell transplantation (SCT). Four patients with myeloid malignancies showed discrepant chimerism results among those three fractions. Three patients had mixed chimerism (MC) of donor/host T cells at a time point around the onset of chronic graft-versus-host disease (GVHD). In two patients with disease relapse, MC of NK cells preceded a morphological relapse or NK cells showed a higher percentage of patient cells compared to NC. Therefore, our study shows that chimerism analysis in lineage-specific cells might be useful in predicting clinical outcome after allogeneic SCT in certain patients.

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