P1/2 of Temozolomide and Hypofractionated Radiotherapy in Tx of Supratentorial Glioblastoma Multiform

To determine the maximum tolerated dose (MTD) of hypofractionated (5 fractions) radiotherapy
with temozolomide for the treatment of glioblastoma multiforme, patients will be evaluated by
a multi-disciplinary team composed of radiation oncologists, neurosurgeons, and
neuro-oncologists to assess for their eligibility. Patient's oncologic history, presenting
symptoms, physical examination, pathology, and imaging studies will be reviewed. Patients
will be evaluated for surgical candidacy and resectability. Patients who are surgical
candidates will undergo a surgical resection prior to radiotherapy. Patients whose tumors are
unresectable or are not good surgical candidates will undergo a biopsy for tissue diagnosis.
Radiation will be delivered in five fractions.

Inclusion Criteria:

- Histopathologically confirmed newly diagnosed glioblastoma multiforme. Diagnosis must
be made by surgical biopsy or excision

- The tumor must be supratentorial in location

- The planning target volume (tumor plus margin) must measure ≤ 150 cm^3 in volume

- Age ≥ 18 years

- Life expectancy of at least 12 weeks

- Patient must have adequate organ function to tolerate temozolomide (details in the
protocol)

Exclusion Criteria:

- Patients who have previously been treated with brain irradiation to the region that
would result in overlap of the radiation fields

- Tumor foci detected below the tentorium

- Multifocal disease or leptomeningeal spread

- Prior allergic reaction to the study drugs involved in this protocol

- Patients with pacemaker will be allowed to undergo CT instead of MRI

- Pediatric patients (age < 18), pregnant women, and nursing patients will be excluded