Malignant monstrocellular brain tumours. A study of 42 surgically treated cases

Area of Science:

• Neuro-oncology
• Tumor Biology
• Immunology

Background:

• Monstrocellular brain tumor (MBT) is a rare oncotype.
• Understanding MBT biology is crucial for improved patient outcomes.

Purpose of the Study:

• To analyze a series of 42 MBT cases over 34 years.
• To investigate factors influencing MBT prognosis and survival.

Main Methods:

• Retrospective review of 42 MBT surgical cases.
• Survival analysis comparing surgery alone vs. surgery with radiotherapy (RT).
• Assessment of tumor characteristics, including lymphocytic infiltration (LI).

Main Results:

• MBT predominantly affects younger individuals and presents as superficial masses.
• Patients receiving postoperative RT showed significantly longer mean survival (57 weeks) than those with surgery alone (32 weeks).
• Definite lymphocytic infiltration (LI) was a significant positive prognostic factor for survival, similar to glioblastoma (GB).

Conclusions:

• MBT is a distinct tumor type with a generally better prognosis than glioblastoma.
• Lymphocytic infiltration plays a critical role in the host immune response and tumor prognosis.
• Giant-monstrous cells may enhance the immune response by increasing the antigenic stimulus.