Dr. Shipp found that chromosome 9p24.1/PD-L1/PD-L2 alterations increase the abundance of the PD-L1 and PD-L2, and their further induction through Janus kinase 2 signal transducers and activators of transcription signaling in classical Hodgkin lymphomas (19). Here, PDCD1LG2 is linked to Hodgkins lymphoma.