The "quality and robustness" of the data Seattle Genetics reported from the successful Phase III Ecehlon-2 study, which assesses the safety and efficacy of Adcetris plus a three-drug chemotherapy regimen versus the standard of care four-drug chemotherapy regimen in frontline mature T-cell lymphomas, represent the "best case scenario," William Blair analyst Andy Hsieh tells investors in a research note. The analyst highlights that the indication was approved 11 days after Seattle Genetics submitted the regulatory application to the FDA, which took advantage of the Real-Time Oncology Review Program. He believes Adcetris will be "quickly adopted" in the frontline mature T-cell lymphoma setting, a $400M market in the United States alone. The analyst keeps an Outperform rating on the shares.