Inclusion Criteria:

Histologically proven malignant glioma (glioblastoma multiforme, anaplastic astrocytoma,
anaplastic oligodendroglioma, or anaplastic mixed oligoastrocytoma) which is progressive
or recurrent after radiation therapy +/- chemotherapy; patients with previous low grade
glioma who progressed after radiotherapy +/- chemotherapy and are biopsied and found to
have a high grade glioma are eligible Karnofsky performance status of >= 60% Patients -
both males and females - with reproductive potential (i.e., premenopausal or menopausal
for less than 1 year and not surgically sterilized) must practice at least 2 contraceptive
measures throughout the study Patients must be registered and meet all the requirements of
iPLEDGE in order to receive 13-cis-Retinoic Acid (CRA) Patients must provide verbal and
written informed consent to participate in the study Patients must have a Mini Mental
Status Exam score >= 15 Patients must have a 12-lead electrocardiogram (EKG) without
evidence of any clinically significant abnormalities Absolute neutrophil count (ANC) >=
1,500/mm^3 Platelets >= 100,000/mm^3 Aspartate aminotransferase (AST) =< 2.5 upper limit
of normal (ULN) (ULN = 50 U/L) Alanine aminotransferase (ALT) =< 2.5 ULN (ULN = 50 U/L)
Total Bilirubin =< 1.5 mg/dL Alkaline phosphatase (Alk. Phos) =< 5X ULN (ULN = 125 U/dL)
Estimated (Estim.) creatinine (Cr) Clearance > 50 ml/min Fasting total cholesterol < 300
mg/dL Fasting triglycerides < 250 mg/dL Two separate, laboratory pregnancy tests within 14
days of registration (for women of childbearing potential) Patients must have recovered
from the toxicity of prior therapy; specifically, there must be at least a 3 month
interval from the completion of the most recent course of radiation therapy, at least a 3
month interval from the implantation of Gliadel wafer(s), at least a 3 week interval from
the completion of a non-nitrosourea-containing chemotherapy regimen, and at least a 6 week
interval from the completion of a nitrosourea-containing chemo-regimen

Exclusion Criteria:

Pregnant or breast-feeding women Uncontrolled intercurrent illness including, but not
limited to, ongoing or active infection, severe cardiovascular disease including recent (<
6 months) myocardial infarction, severe psychiatric illness that would limit compliance
with study requirements, or any other disorder that would be incompatible with the study
therapy Any history of inflammatory bowel disease Any history of uncontrolled depression,
any history of hospitalization for depression, or any history of suicidal thoughts or
attempt(s) Patients receiving concurrent therapy for their tumor (with the exception of
steroids) Must have at least a 10 day interval from last dose of vitamin A, tetracyclines,
micro-dosed progesterone preparations, norethindrone/ethinyl estradiol, St. John's Wort,
fish oil supplements, or phenytoin or other P450 enzyme inducing antiepileptic drugs
Current smokers (Smoking >= 11 cigarettes per day), as smoking increases metabolism and
decreases serum levels of erlotinib Participants may not have received prior EGFR
inhibitors for any disease Patients with a history of allergic reactions to
13-cis-retinoic acid (CRA) or compounds of similar biologic or chemical composition to CRA
Known allergy to proton pump inhibitors