Detection of bone marrow micrometastasis and microcirculating disease in rhabdomyosarcoma by a real-time RT-PCR assay

Soledad Gallego*, Anna Llort, Josep Roma, Constantino Sabado, Luis Gros, Josep Sanchez De Toledo

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)


Purpose: To assess if molecular detection of minimal disseminated disease by real-time reverse transcription and polymerase chain reaction (RT-PCR) could contribute to a better treatment stratification in patients with rhabdomyosarcoma (RMS). Methods: Relative quantification of the tumor-mRNA present in serial samples of bone marrow (BM) and peripheral blood (PB) from 16 patients with RMS (7 alveolar and 9 embryonal) was performed by a real-time RT-PCR assay. Expression of MyoD1 and acetylcholine receptor (AChR) was analyzed in all samples, along with PAX3/7-FKHR in samples from alveolar tumors. Results: A good correlation was found between the expression of PAX3/7-FKHR and AChR, while MyoD1 was more sensitive but less specific. In this study, patients with positive PB at the end of treatment showed a poorer prognosis than patients with negative PB. Moreover, in this patient cohort, metastatic relapses were preceded by the detection of microcirculating disease in all cases. Conclusion: The detection of minimal circulating and micrometastatic disease by real-time RT-PCR, based on the expression of multiple genes, yields highly reproducible results. Patients with positive PB after treatment show poorer survival than patients without microcirculating disease.

Original languageAmerican English
Pages (from-to)356-362
Number of pages7
JournalJournal of Cancer Research and Clinical Oncology
Issue number6
Publication statusPublished - Jun 2006


  • Circulating tumor cells
  • Micrometastatic disease
  • Minimal residual disease
  • Real-time PCR
  • Rhabdomyosarcoma


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