Combined polymerase chain reaction methods to detect c-myc/IgH rearrangement in childhood Burkitt's lymphoma for minimal residual disease analysis..     ///    Using the combined PCR methods the detection of c-myc/IgH reaches a level of sensitivity required for the evaluation of minimal residual disease (MRD) in BL patients.     ///    "However, the investigation of 18 c-myc/IgH-positive BL patients with each breakpoint-specific nested PCR showed an inter-patient variability of sensitivity between 10(-3) and 10(-5). "    ///    "Due to the large variability of the breakpoint region, only the recently improved long-distance LD-polymerase chain reaction (PCR) allows the specific c-myc/IgH fusion to be identified at the genomic level. "