Is there an age limit? No

Inclusion Criteria:

1. Patients with histologically proven supratentorial malignant primary gliomas
(Glioblastoma multiforme (GBM), Gliosarcoma (GS) Anaplastic astrocytoma (AA),
Anaplastic oligodendroglioma (AO), mixed anaplastic glioma (MAG)) will be eligible
for this protocol.

2. Patients must have shown unequivocal evidence for tumor recurrence or progression by
MRI scan after radiation therapy.

3. Patients in the GBM stratum may have had treatment for no more than 2 prior relapses;
for the AA stratum, there is no limitation for the number of relapses provided all
other eligibility criteria particularly the functional status are met.

4. All patients must sign an informed consent.

5. The baseline on-study MRI should be performed within 14 days prior to registration
and on a stable or decreasing steroid dosage.

6. Patients having undergone recent resection of recurrent or progressive tumor will be
eligible.

7. Patients must have a life expectancy > 8 weeks.

8. Patients must have a Karnofsky performance status of >= 70

9. Patients must have recovered from the toxic effects of prior therapy: 4 weeks from
prior cytotoxic therapy and/or at least two weeks from vincristine, 6 weeks from
nitrosoureas, 3 weeks from procarbazine administration, and 1 week for non-cytotoxic
agents, e.g., interferon, tamoxifen, cis-retinoic acid, etc. (radiosensitizer does
not count). Patients who receive either Temozolomide or CPT-11 for non-therapeutic
purposes (such as presurgically for obtaining pharmacology data for the agent) will
be eligible for study entry provided they have recovered from the toxic effects of
the agent if any.

10. Patients must have adequate bone marrow function (Absolute neutrophil count (ANC)>
1,500/mm3 and platelet count of > 100,000/mm3), adequate liver function (alanine
aminotransferase (ALT or SGPT) and alkaline phosphatase <2 times normal, bilirubin
<1.5 mg/dl), and adequate renal function (blood urea nitrogen (BUN) and creatinine
<1.5 times institutional normal) prior to starting therapy.

11. Patients must not be pregnant and must practice adequate contraception during the
study and for 2 months after participation in study.

Exclusion Criteria:

1. Patients with a history of any other cancer (except non-melanoma skin cancer or
carcinoma in-situ of the cervix), unless in complete remission and off of all therapy
for that disease for a minimum of 3 years are ineligible.

2. Patients must not have: a) active infection b) disease that will obscure toxicity or
dangerously alter drug metabolism c) serious intercurrent medical illness. d) prior
recurrence with CPT-11 (for the CPT-11 + Thalidomide arm) (prior treatment with
thalidomide is permitted). e) grade 2 or higher peripheral neuropathy. Patients who
have received Temozolomide or CPT-11 for non-therapeutic purposes (for eg., as part
of a pharmacology study without therapeutic intent) will remain eligible for
enrollment into the study.

3. No exclusion to this study will be based on race. Minorities will actively be
recruited to participate. The malignant glioma patient population treated at MDACC
over the past year is as follows: American Indian or Alaskan Native - 0 Asian or
Pacific Islander - <2% Black, not of Hispanic Origin - 3% Hispanic - 6% White, not
of Hispanic Origin - 88% Other or Unknown - 2% Total-100%