Recent studies indicate that microRNAs (miRNAs) are mechanistically involved in the development of various human malignancies and therefore represent a promising new class of biomarkers. Quantitative PCR-based technologies are emerging as the gold standard for miRNA profiling. Here, a commercially available miRNA assay was used to measure and compare the expression levels of 154 miRNAs of seven lymph node samples using the LightCycler® 480 Instrument and a competitor real-time PCR system. We observed highly similar results for 134 miRNAs (87%) and some larger deviations (20 miRNAs/13%). In addition to large-scale miRNA profiling, it is also possible to use the LightCycler® 480 System in the assessment of miRNA expression in small sample sizes. We have conclusively demonstrated that miR-205 can be detected in a dose-dependent manner in a dilution series of 50, 10, 5, and 1 cell(s) of the KU19-19 cell line. more