Pediatric cases of a brainstem glioma are one of the most difficult tumors to treat. In children, this type of cancer is perhaps the most dreaded of cancers due to its poor prognosis, yet it remains an area of intense research. In the case presented herein, conventional chemotherapy and radiotherapy treatments were not showing any improvement. The patient was then treated with high-dose intravenous vitamin C (IVC) and endolaser therapy. A significant reduction in glioma's size was achieved in 2 months with this adjunct therapy. These results present a possibility of decreasing brainstem glioma progression with adjuvant IVC and endolaser therapy.