Quantitative PCR detection of NPM/ALK fusion gene and CD30 gene expression in patients with anaplastic large cell lymphoma--residual disease monitoring and a correlation with the disease status..     ///    ALCL is frequently associated with a NPM/ALK fusion gene which is found in up to 75% of pediatric ALCLs.     ///    RQ-RT-PCR of NPM/ALK expression is a promising and rapid approach for monitoring MRD..     ///    Five out of nine relapses were preceded or were accompanied by minimally half log increased NPM/ALK levels in the BM.     ///    "In all BM samples from relapses and/or closely before a relapse, BM samples revealed NPM/ALK and CD30 positivity in at least one of the iliac BM trephines. "    ///    Real-time quantitative RT-PCR (RQ-RT-PCR) of NPM/ALK and CD30 gene expression was employed to analyze minimal residual disease (MRD) in 10 patients with NPM/ALK positive ALCL in 79 follow-up bone marrow (BM) and/or peripheral blood (PB) samples. 