This study is for patients who have cancer and are experiencing loss of weight and appetite. The study wants to find out if this taking olanzapine for four weeks will increase your appetite as compared to megestrol acetate. The study is looking to see if that approach is better or worse than the usual approach for your loss of appetite and weight. The usual approach is defined as care most people get for loss of appetite.

This research study is enrolling participants that have been diagnosed with advanced gastric cancer (a disease in which cancer cells form in the lining of the stomach) or gastroesophageal junction cancer (a type of cancer forming in the area where the tube that connects the mouth and the stomach join together) and have not received prior treatment for advanced cancer and the tumor has already tested positive for fibroblast growth factor receptor 2b (FGFR2b) expression. FGFR2b is a protein that possibly causes cells to grow more quickly and multiply abnormally. The purpose of this study is to see if bemarituzumab is safe, tolerable, and effective when administered along with mFOLFOX6 (a combination of 5 fluorouracil [5 FU], oxaliplatin and leucovorin) and nivolumab and whether it causes any side effects. Bemarituzumab is not approved by the Food and Drug Administration (FDA). Participants will be pre-screening to see if they qualify to participate in Part 2. During the pre-screening portion, participants will provide either archived tissue or a fresh tumor sample in order to test for FGFR2b proteins. If the test results show an excessive amount of FGFR2b proteins in the tumor, participants may be asked to consider participating in the Part 2 study involving bemarituzumab, an investigational drug for people with advanced gastric or gastroesophageal junction cancer. Participants in this study will receive either bemarituzumab with mFOLFOX6 and nivolumab or placebo with mFOLFOX6 and nivolumab. The placebo will look like bemarituzumab but it will not contain active ingredients and has no effect on participants' condition. This study involves pharmacokinetic testing which is a blood test to determine how much study drug is in the blood. Bemarituzumab is not approved by the Food and Drug Administration (FDA). Participants could be in this study for up to 40 months and up to 57 visits.

This study is for newly diagnosed or previously untreated low-grade glioma (LGG). The overall goal of this study is to see if selumetinib works just as well as the standard treatment using carboplatin and vincristine (called CV) for subjects with LGG. Selumetinib is a drug that works by blocking a protein (a basic building block of the human body) that lets cancer cells grow without stopping. Participants can expect to receive treatment on this study for about 1–2 years. After study completion, participants will continue to be followed for up to 10 years.

This study is for patients that have been diagnosed with non-germinomatous germ cell tumor (NGGCT). The goal of this study is to see if radiation therapy (RT) to the spine and a portion of the brain works just as well as the standard treatment, which includes RT to the whole brain and spine, for people with NGGCT who agree to take part in this study, and whose disease responds well to induction chemotherapy, or who have no signs of disease following surgery. Participants can expect to receive treatment on this study for about 6 to 11 months, depending on which therapy they receive. After study completion, participants will continue to be followed for up to 10 years.

This study is for newly diagnosed previously untreated neurofibromatosis type 1 (NF1) associated with low-grade glioma (LGG). The purpose of this study is to see if selumetinib works just as well as the standard treatment of carboplatin/vincristine (CV) for subjects with NF1-associated LGG, and to see if selumetinib is better than CV in improving vision in subjects with LGG of the optic pathway. Participants can expect to receive treatment for up to 24 months, until the cancer gets worse or until the side effects are too great. After study completion, participants will continue to be followed for up to 10 years.

The purpose of this study is to collect blood samples to determine if a blood-based test can be used to identify lung cancers that may or may not also be seen on images of lungs. Additionally, the study aims to see if a blood-based test can identify other types of cancers and health conditions.

This study is for patients with colorectal cancer. This study is being done to see if we can lower the chance of colorectal cancer growing or spreading by adding a drug to the usual combination of drugs.

The purpose of the study is to evaluate the safety and how well the medication sotatercept works versus placebo in treating Heart Failure with a Preserved Ejection Fraction. The study will also look at information obtained from the tests performed as part of the study to see if subjects have improvement in symptoms of heart failure. Participation in this study will last approximately 26 months. During the study period subjects will be asked to attend regular study visits with the research coordinator. These visits will include such activities as blood tests, questionnaires, physical evaluation by a study doctor, a right heart catheterization with exercise, echocardiogram, and 6 minute hall walks. There will be 35 visits as part of participation in this clinical trial.

Participants will be randomized to either the treatment group (and receive the medication) or the control group (and not receive the medication). Subjects will have a 66:33 chance of receiving the study medication during their participation in the trial. The treatment assignment is determined by randomization, where a computer selects at random which treatment group you will be in (like drawing straws). Neither the subject, nor the blinded personnel will know which group subjects are in. Neither the subject nor the study doctor will decide what group subjects are assigned.

Maxillary expanders are orthodontic appliances that are commonly used to expand the upper jaw. The purpose of this study will be to compare the effects produced by two different maxillary expanders in children 8-13 years old. The first type of expander is made by hand in an orthodontic laboratory, and the second type of expander is designed on a computer and printed using 3D printers. Both expanders are already used in the MUSC Orthodontics Clinic. The purpose of this study is to see if the 3D printed expander is as effective as the traditional expander made by hand in the laboratory, with more comfort to the patient. Patients participating in the study will be randomly assigned to one of two groups: group A will be treated with a laboratory-made maxillary expander, and group B with a 3D-Printed maxillary expander. Information will be collected on the participants' standard clinical follow-up visits including photos, x-rays, and dental photo scans over the course of 6 months to see how the expander is working. In addition, as part of the research study, the participant will be asked to complete online questionnaires with assistance from parents or guardians about his/her quality of life and perception of possible pain and discomfort at different time points. The potential benefits of this study include the use of 3D technology to improve the quality of the orthodontic treatment, with more comfort to the patient.

This study is testing cannabidiol (CBD) as a possible medication to treat alcohol use disorder. Youth (ages 16-22) will receive one dose of CBD (600mg) or placebo (i.e., sugar water) before two different MRI sessions (separated by 2 weeks) to see how CBD affects the brain. The full study will last approximately one month.

Participants must provide informed consent and youth under 18 must have parental consent to participate.

Compensation is available to those who qualify.