Diffuse midline glioma H3K27M mutation in adult: A case report

Introduction Diffuse midline glioma with H3 K27M mutation is a new tumor entity from 2016 which is highly aggressive and classified as a WHO Grade IV tumor regardless of histopathologic features. DMG is an aggressive tumor with a poor prognosis, predominating in children and rarely in adults. The clinicopathologic features in adults remain poorly characterized. Case presentation Herein we report a case of a 28-year-old female with diffuse midline glioma with pathology confirmation of histone H3 K27M mutation presenting predominately with left upper and lower limb weakness for 3 weeks followed by an event of loss of consciousness and suspicious mass in MRI Brain/CT Brain. It was confirmed by immunoreactive H3K27M with a score of 4+ in neoplastic cells, which revealed Diffuse midline glioma, H3K27M mutant. Clinical discussion Diffuse midline glioma with histone H3–K27M mutation recently classified CNS tumor with grade IV, including both morphologic and molecular features for diagnosis and associated with poor prognosis. Conclusion We report a case of adult diffuse midline glioma with H3K27M. The prognosis of diffuse midline glioma is poor and dependents solely on H3K27M irrespective of its grade and characteristics. A comprehensive study of diffuse midline glioma on clinical, radiographic, and demographic features in adult is needed.