The diagnosis of glioblastoma was confirmed on histology. Other differential diagnoses are less plausible. Glioblastoma is the most frequent corpus callosal tumor. Another tumor that can involve the corpus callosum is lymphoma, but it is not hemorrhagic/necrotic-like this, and it is hyperdense on CT.

Note: IDH mutation status is not provided in this case and according to the 5th Edition (2021) of the WHO classification of CNS tumors, this tumor would, therefore, be designated as a glioblastoma NOS.