Regrowth patterns of supratentorial gliomas: estimation from computed tomographic scans

Area of Science:

• Neuro-oncology
• Radiology
• Pathology

Background:

• Gliomas are primary brain tumors with varying degrees of malignancy.
• Understanding tumor regrowth patterns is crucial for treatment planning and prognosis.
• Recurrent gliomas present unique challenges in management.

Purpose of the Study:

• To elucidate the distinct regrowth dynamics of benign versus malignant gliomas.
• To quantify tumor doubling times (Td) for different glioma subtypes.
• To assess the impact of radiotherapy on glioma growth rates.

Main Methods:

• Analysis of serial computed tomographic (CT) scans from 21 patients with pathologically verified recurrent supratentorial gliomas.
• Calculation of doubling times (Td) for enhanced and low-density areas.
• Grading of enhancement effect and assessment of tumor dissemination and contralateral extension.

Main Results:

• Benign gliomas exhibited significantly longer doubling times (Td) for both enhanced (937 days) and low-density areas (895 days) compared to malignant gliomas.
• Malignant astrocytomas (Td: 65.1 days) and glioblastomas (Td: 48.1 days) showed similar rapid regrowth rates.
• Radiotherapy significantly retarded malignant glioma growth, effectively doubling their Td.

Conclusions:

• Tumor regrowth patterns differ markedly between benign and malignant gliomas.
• Malignant gliomas demonstrate rapid proliferation, while benign gliomas grow considerably slower.
• Radiotherapy demonstrates efficacy in controlling the growth of malignant gliomas.