Patient description: The patient is a 41-year-old man and a known case of Acromegaly who underwent transsphenoidal surgery 4 months ago. He came to the clinic for the follow up lab studies after his primary resection surgery. His lab study shows the IGF-1 level of 4.5 ULN adjusted by sex and age. His random GH level is 4 ug/L. The recent brain MRI confirmed the residual pituitary tumor. His past medical history is only significant for acromegaly due to pituitary adenoma and the recent surgery. After his surgery he takes only vitamin D and multivitamins.

Clinical trial eligibility criteria: eligible ages (years): 18.0-999.0,  Adult Hepatocellular Carcinoma Advanced Adult Hepatocellular Carcinoma Endometrial Serous Adenocarcinoma Localized Non-Resectable Adult Liver Carcinoma Lung Carcinoid Tumor Malignant Pancreatic Gastrinoma Malignant Pancreatic Glucagonoma Malignant Pancreatic Insulinoma Malignant Pancreatic Somatostatinoma Metastatic Digestive System Neuroendocrine Tumor G1 Ovarian Carcinosarcoma Ovarian Endometrioid Adenocarcinoma Ovarian Seromucinous Carcinoma Ovarian Serous Surface Papillary Adenocarcinoma Pancreatic Alpha Cell Adenoma Pancreatic Beta Cell Adenoma Pancreatic Delta Cell Adenoma Pancreatic G-Cell Adenoma Pancreatic Polypeptide Tumor Recurrent Adult Liver Carcinoma Recurrent Digestive System Neuroendocrine Tumor G1 Recurrent Fallopian Tube Carcinoma Recurrent Ovarian Carcinoma Recurrent Pancreatic Neuroendocrine Carcinoma Recurrent Primary Peritoneal Carcinoma Recurrent Uterine Corpus Carcinoma Regional Digestive System Neuroendocrine Tumor G1 Stage IIIA Fallopian Tube Cancer Stage IIIA Ovarian Cancer Stage IIIA Primary Peritoneal Cancer Stage IIIA Uterine Corpus Cancer Stage IIIB Fallopian Tube Cancer Stage IIIB Ovarian Cancer Stage IIIB Primary Peritoneal Cancer Stage IIIB Uterine Corpus Cancer Stage IIIC Fallopian Tube Cancer Stage IIIC Ovarian Cancer Stage IIIC Primary Peritoneal Cancer Stage IIIC Uterine Corpus Cancer Stage IV Fallopian Tube Cancer Stage IV Ovarian Cancer Stage IV Primary Peritoneal Cancer Stage IVA Uterine Corpus Cancer Stage IVB Uterine Corpus Cancer Uterine Carcinosarcoma Histologically or cytologically confirmed endometrial (endometrioid, uterine, papillary serous carcinoma, and carcinosarcoma), ovarian (primary peritoneal/fallopian tube, serous, endometrioid, mixed, and poorly differentiated epithelial ovarian cancers [for purposes of carcinosarcoma is considered a poorly differentiated carcinoma]), hepatocellular carcinoma, carcinoid or islet cell (neuroendocrine: well or moderately-differentiated neuroendocrine) cancer which are locally advanced, recurrent, or metastatic Patients must have measurable disease; patients having only lesions measuring >= 1 cm to < 2 cm must use spiral computed tomography (CT) imaging for both pre and post-treatment tumor assessments; patients who have had prior palliative radiotherapy to metastatic lesion(s) must have at least one measurable lesion(s) that have not been previously irradiated Radiation therapy (adjuvant or palliative) must be completed >= 4 weeks prior to registration, if applicable Absolute neutrophil count (ANC) >= 1500/mm^3 Platelets >= 75,000/mm^3 Hemoglobin >= 9.0 g/dL Total bilirubin =< 1.5 x upper limit of normal (ULN); Note: direct bilirubin and international normalized ratio (INR) for hepatocellular carcinoma (HCC) patients allowed as per Child-Turcotte-Pugh scoring Alkaline phosphatase =< 2.5 x ULN (=< 5 x ULN if liver metastasis is present or patient is in HCC cohort)  Prior therapy with vascular endothelial growth factor receptor (VEGFR) targeting agents or mammalian target of rapamycin (mTOR) inhibitors (except as in HCC and in the Islet cell single agent bevacizumab alone cohort where prior mTOR inhibitor is allowed); Note: prior use of bevacizumab is not allowed in any cohort Invasive procedures defined as follows Major surgical procedure, open biopsy or significant traumatic injury =< 4 weeks prior to registration Anticipation of need for major surgical procedures during the course of the study Core biopsy =< 7 days prior to registration Serious or non-healing wound, ulcer or bone fracture History of abdominal fistula, gastrointestinal perforation or intra-abdominal abscess =< 180 days prior to first date of bevacizumab therapy Evidence of bleeding diathesis or coagulopathy in the absence of therapeutic anticoagulation Evidence of a history bleeding =< 6 months such as hemoptysis, or cerebrovascular accident =< previous 6 months, or peripheral vascular disease with claudication on < 1 block, or history of clinically significant bleeding, because of the potential bleeding and/or clotting risk with bevacizumab Untreated central nervous system (CNS) metastases; exceptions: patients with known CNS metastases can be enrolled if the brain metastases have been adequately treated and there is no evidence of progression or hemorrhage after treatment as ascertained by clinical examination and brain imaging (MRI or CT) =< 12 weeks prior to registration and no ongoing requirement for steroids