The presence of mixed hypodense shadows in the postoperative region of glioma may be due to conditions such as hemostatic material in the surgical region, ischemic changes in the brain tissue, or residual brain tumor.
In the early postoperative review of skull CT after glioma surgery, the hemostatic materials during surgery, such as gelatin sponge and fluid gelatin, were hypointense, while the brain tissues were isointense, so there were mixed hypointense shadows in the surgical region.
If the blood vessels around the glioma are electrocoagulated during surgery, vasospasm and ischemic changes may occur in or around the surgical area, which may lead to cerebral infarction in severe cases, and the above mentioned changes are manifested as low density in CT, and the surgical area tends to have mixed hypodense shadows.
If the glioma is not completely resected during surgery or the tumor recurs after surgery, mixed low-density shadows will also appear on CT.
When the glioma surgery area appears mixed low density shadow should be taken seriously, it is recommended to go to the neurosurgery department of the regular hospital, and the doctor will carry out the corresponding treatment according to the different situations.