Multifocal brain radionecrosis masquerading as tumor dissemination

Area of Science:

• Neurology
• Radiology
• Oncology

Background:

• Oligodendroglioma resection and radiation therapy are standard treatments for brain tumors.
• Advances in aggressive cancer therapies are improving patient survival rates.
• Increased survival necessitates greater awareness of treatment-induced complications.

Observation:

• A case of autopsy-proven multifocal radionecrosis affecting both cerebral hemispheres is presented.
• The radionecrosis mimicked tumor dissemination on computed tomography (CT) scans.
• Imaging occurred 13 months after the patient's oligodendroglioma resection and radiation therapy.

Findings:

• Radiation damage can manifest as disseminated lesions on CT scans.
• Multifocal radionecrosis can be mistaken for recurrent or metastatic brain tumors.
• Accurate differentiation between radionecrosis and tumor recurrence is critical.

Implications:

• The incidence of radiation-induced complications like radionecrosis is expected to rise with improved patient survival.
• Radiologists and oncologists must consider radionecrosis in the differential diagnosis of suspicious lesions post-radiation.
• Timely and accurate diagnosis of radionecrosis is essential for appropriate patient management and potentially life-saving interventions.