Bevacizumab in Combination With Temozolomide in Patients With Neuroendocrine Tumors

Patients will receive temozolomide orally once daily for one week, followed by a one-week rest period. This one-week on/one week off schedule will continue for the duration of treatment unless significant side effects develop.

Bevacizumab will be administered intravenously every other week. After eight weeks (two cycles), a CT scan will be performed to see how treatment affected tumor growth.

Bactrim, an antibiotic, and acyclovir, an antiviral medicine, will be given in order to help prevent infection.

Blood tests will be done every other week to evaluate any side effects.

Once the study has been completed, a physical exam, vital signs, blood tests, and CT scan will be performed.

Patients will remain on the study as long as they continue to receive benefit from the treatment and there are no serious side effects.

Inclusion criteria

• Histologically documented locally unresectable or metastatic neuroendocrine tumor excluding small cell carcinoma
• Measurable disease > 1cm by spiral computed tomography (CT) or > 2cm by other radiographic technique
• ECOG performance status of 0-2
• Life expectancy of > 12 weeks
• Prior treatment with chemotherapy is allowed
• Total bilirubin < 2.0mg/dl
• AST < 5x upper limit of normal (ULN)
• Serum creatinine < 2.0mg/dl
• Absolute neutrophil count > 1,000/mm3
• Platelets > 100,000/mm3
• International Normalized Ratio (INR) < 1.5

Exclusion criteria

• Prior treatment with temozolomide, decarbazine or bevacizumab
• Clinically apparent central nervous system metastases or carcinomatous meningitis
• Clinically significant cardiovascular disease
• Major surgery, open biopsy, or significant traumatic injury within 28 days
• Pregnant or breast-feeding women
• Chronic, daily treatment with aspirin or nonsteroidal anti-inflammatory medication
• Serious, nonhealing wound, ulcer or bone fracture
• Evidence of bleeding diathesis or coagulopathy
• History of other disease or metabolic dysfunction