The Langenau Laboratory at the Massachusetts General Hospital, Boston is recruiting up to three research fellows to study mechanisms of progression and relapse in T and B cell leukemia and rhabdomysorcoma – a tumor of muscle. Research will focus on using the zebrafish genetic model, biochemistry, and cross-species bioinformatics approaches to identify novel pathways that drive progression and relapse. Following discoveries made in the zebrafish model, work will continue in characterizing discoveries in human cell culture, primary patient samples, and mouse xenograft studies.