Malignant Peripheral Nerve Sheath Tumors

People who have a cancer called MPNST, or Malignant Peripheral Nerve Sheath Tumor, may be eligible for this study. The purpose of this study is to see if a new medicine called BMS-986504 may work better than other available medicines for people with MPNST. Methylthioadenosine Phosphorylase (MTAP) loss is a gene mutation that some people have. MTAP loss seems to increase the chance that BMS-986504 can kill MPNST cancer cells. People who are missing MTAP from their tumor may be able to enroll in this study. Treating MPNST based on MTAP loss is considered experimental and is not approved by the US Food and Drug Administration (FDA) for determining whether BMS-98650 will be active against cancer. The purpose of this study is to evaluate the safety and effectiveness of BMS-986504 in participants with MPNST.

3CAR is being done to investigate an immunotherapy for patients with solid tumors. It is a Phase I clinical trial evaluating the use of autologous T cells genetically engineered to express B7-H3-CARs for patients ≤ 21 years old, with relapsed/refractory B7-H3+ solid tumors. This study will evaluate the safety and maximum tolerated dose of B7-H3-CAR T cells.The purpose of this study is to find the maximum (highest) dose of B7-H3-CAR T cells that are safe to give to patients with B7-H3-positive solid tumors. Primary objective To determine the safety of one intravenous infusion of autologous, B7-H3-CAR T cells in patients (≤ 21 years) with recurrent/refractory B7-H3+ solid tumors after lymphodepleting chemotherapy Secondary objective To evaluate the antitumor activity of B7-H3-CAR T cells Exploratory objectives * To evaluate the tumor environment after treatment with B7-H3-CAR T cells * To assess the immunophenotype, clonal structure and endogenous repertoire of B7-H3-CAR T cells and unmodified T cells * To characterize the cytokine profile in the peripheral blood after treatment with B7-H3-CAR T cells

The purpose of this study is to find out whether selinexor is an effective treatment for people who have a relapsed/refractory Wilms tumor, rhabdoid tumor, MPNST, BCOR-driven sarcoma, or another solid tumor that makes a higher than normal amount of XPO1 or has genetic changes that increase the activity of XP01.

First, the investigators plan to use a retrospective analysis to determine the clinical landscape of neurofibromatosis (NF)1-associated malignant peripheral nerve sheath tumor (MPNST) and precursor lesions (e.g., atypical or nodular plexiform neurofibromas). A worldwide database will be established, collecting, in a standardized manner, histologic, immunohistochemical, molecular, radiographic, treatment, and related clinical data from centers worldwide with expertise in these NF1-related cancers. Although retrospective in nature, the resulting data from this registry may reveal previously unanticipated patterns, similar to the INFACT effort outcome. This registry would then allow the acquisition of data associated with MPNST biospecimens collected under associated banks (frozen or paraffin-embedded, germline (or normal tissue DNA) samples, and any previously somatic whole-exome or whole-genome sequencing data for aggregate analyses). Second, the investigators plan to co-register patients to institutional banks in order to prospectively collect MPNST samples for analysis. These patients will be consented in order to collect the above information and for banking of tumor tissue and future studies that include genomic characterization of the tumors.

The goal of this observational study is to determine if a liquid biopsy (i.e. blood test) is an effective clinical tool for monitoring the development of malignant peripheral nerve sheath tumor (MPNST) among adults (18 years and older) with Neurofibromatosis Type 1 (NF1), compared to the current standard of care. The main questions it aims to answer are: How effective is liquid biopsy compared to the current standard of care (clinical surveillance and imaging) for early detection of MPNST development among people with NF1? Can liquid biopsy offer a cost-effective method for early detection of MPNST in people with NF1? Also, can liquid biopsy provide earlier detection that potentially leads to better outcomes? Also, can offering liquid biopsy improve access to care for people experiencing barriers to access (such as minority populations or people in rural areas)? At baseline, participants will be asked to: * Complete surveys to provide their demographic and NF1-related health information. * Report whether or not they are experiencing MPNST-related symptoms. * Provide blood samples (15 mL blood total between three tubes, which is approximately one tablespoon). Every six months during the five-year follow-up period, participants will be asked to: * Complete additional surveys to report whether or not they are experiencing MPNST-related symptoms and/or if they have been diagnosed with a new MPNST. * Provide an additional blood sample (10 mL blood total in one tube). If diagnosed with an MPNST by their healthcare provider during the follow-up period, participants will be asked to: * Complete an additional survey regarding their diagnosis and symptoms. * Provide an additional blood sample (10 mL blood in one tube). * In parallel, the study team will request a sample of tumor tissue from the care provider, if available.

This is a Phase 1, open-label, multicenter, study of the safety, tolerability, PK, PD, and anti-tumor activity of MRTX1719 patients with advanced, unresectable or metastatic solid tumor malignancy with homozygous deletion of the MTAP gene.

This study will evaluate the safety and efficacy of MASCT-I combined with Doxorubicin and Ifosfamide for first-line treatment in patients with advanced soft tissue sarcoma.