On June 5th, 2020, Dr. Xiaofan (Gary) Guo successfully defended his PhD thesis entitled “Immune Regulation of Brain Tumors”. Dr. Guo was a visiting MD/Ph.D. student in the laboratory of Dr. David H. Gutmann from 2017-2020, where he sought to define the interactions between neurons, immune cells and tumor cells in NF1-associated optic pathway gliomas. Gary’s beautiful work on the “neuron-immune-cancer cell axis” was published last year in Neuro-Oncology, and earlier this year in Nature Communications. Dr. Guo is currently a Neurology resident at Loma Linda University.