Roemer Roemer MG MG PD-L1 and PD-L2 genetic alterations define classical Hodgkin lymphoma and predict outcome PD-L1 and PD-L2 genetic alterations define classical Hodgkin lymphoma and predict outcome J Clin Oncol J Clin Oncol 2016 2016 34 34 23 23 2690 2690 2697 2697 10.1200/JCO.2016.66.4482 10.1200/JCO.2016.66.4482 27069084 27069084. The gene discussed is PDCD1LG2; the disease is Hodgkins lymphoma.