{Reference Type}: Systematic Review {Title}: Diffuse Midline H3K27-Altered Gliomas in the Spinal Cord: A Systematic Review. {Author}: Watanabe G;Wong JM;Estes B;Khan MF;Ogasawara C;Umana GE;Martin AR;Bloch O;Palmisciano P; {Journal}: J Neurooncol {Volume}: 166 {Issue}: 3 {Year}: 2024 Feb 12 {Factor}: 4.506 {DOI}: 10.1007/s11060-024-04584-8 {Abstract}: OBJECTIVE: To systematically review the clinical features, management, and outcomes of diffuse midline H3K27-altered gliomas of the spinal cord (DMG-SCs).
METHODS: PubMed, Ovid EMBASE, Scopus, and Web of Science were searched from database inception to 23 September 2023 for histologically confirmed cases of DMG-SC. Patient demographics, tumor characteristics, management information, and survival outcomes were extracted and analyzed.
RESULTS: A total of 279 patients from 39 studies were collected. Patients were mostly male (61%), with an average age of 32 years. Patients were treated with surgery, radiotherapy, and chemotherapy combined (31%) or surgery only (24%), and extent of resection was most often subtotal (38%). Temozolomide was the most common chemotherapeutic agent (81%). Radiation therapy was delivered with mean dose of 47 Gy in 23 fractions. At mean follow-up time of 21 months, 13% of patients were alive. Average median overall survival was 24 months (range of 13 to 40 months) with a median progression-free survival of 14 months. Historical WHO grades of 2 or 3 appeared to exhibit a longer average median overall survival time than that of grade 4 DMG-SCs (32 vs. 23 months, p = 0.009).
CONCLUSIONS: Outcomes for DMG-SCs are poor overall but appear to be favorable compared to intracranial DMGs. Despite the recent WHO 2021 grade 4 classification for all DMGs, given the differences in overall survival reported based on historical grading systems, future studies on DMG-SCs are needed to further define if DMG-SCs may represent a heterogeneous group of tumors with different prognoses.