Our lab works on the clinical and molecular aspects of solid tumours of childhood, particularly germ cell tumours (GCTs) – of which testicular cancer is the most common form. Our work has established emphasis on the role of non-coding RNAs such as microRNAs, which are short, non-protein-coding RNAs that regulate gene expression post-transcriptionally and are aberrantly expressed in cancer. We demonstrated for the first time that the miR-371~373 and miR-302/367 clusters are highly over-expressed in all malignant GCTs, regardless of patient age, histological subtype or anatomical site (published in Cancer Research in 2010). This is a specific change, as these microRNAs are not co-ordinately dysregulated in any other malignancy or disease state. We subsequently were the first to demonstrate the potential utility of specific circulating microRNAs for diagnosis, disease-monitoring and detection of relapse in GCTs as well as other childhood tumours.