We are recruiting mothers of children with typical development, autism, or fragile X syndrome.

This study focuses on parental experiences and normal individual differences that may influence child language development. The broader goal of the study is to understand which family experiences support language development in children who have neurodevelopmental disabilities, such as autism. We are recruiting families who have children who are typically developing, have autism, or have fragile X syndrome.

There is no current standard treatment for recurrent/refractory
medulloblastoma/PNET. The combination of the drugs temozolomide and
irinotecan has been used to treat adults and children with other types of cancer.
The combination has also been used in previous studies to treat a small number
of children with recurrent or refractory medulloblastoma/PNET as well as other
recurrent tumors, with encouraging results. This study uses the results of these
earlier studies, and looks at how well giving temozolomide and irinotecan daily
for 5 days every 28 days works when given to children and young adults with
recurrent or refractory medulloblastoma/PNET.

Ependymoma is a type of rare childhood cancer that occurs in the brain and spinal cord. Survival statistics are generally disappointing with a 5-year survival of 50-64%. The standard of care for ependymoma is maximal surgical resection followed by radiation therapy directed at the primary site of disease.

Radiation therapy is associated with immediate and long-term toxicities in children, especially young children. For this reason, it has been the practice of some doctors not to give radiation therapy to children with ependymoma when the tumor has been completely surgically removed. The investigators who designed this study have created strict measures to choose those who will not receive additional treatment after surgery and careful follow-up to minimize the risks to those who are assigned to observation only.

The overall goal of this study is to find out what effects, good and/or bad, a low
dose and a high dose of lenalidomide have on children, adolescents and young
adults with recurrent (has come back after being treated), refractory (has not gone
away with previous treatment), or progressive (is not responding to previous
treatments) Juvenile Pilocytic Astrocytomas (JPA) and Optic Pathway Gliomas
(OPG).

The purpose of this study is to create and maintain a registry, which is a database (a searchable collection of information) about children, adolescents and young adults with pediatric onset of rheumatic diseases. This data may help in the evaluation of the safety and benefit of medications that are prescribed to patients who have rheumatic diseases.

The purpose of this study is to evaluate the efficacy of the medication N-acetylcysteine (NAC) to help young people quit using marijuana. NAC is an over-the-counter supplement and antioxidant that has been approved by the Food and Drug Administration (FDA) in adults and children for other uses, but has not been approved by the FDA for treatment of marijuana use disorder. Volunteers ages 13-21 are needed for this study.

This study is for patients that have been diagnosed with High Risk B-Lymphoblastic Leukemia (HR B-ALL). The investigational drug in this study is Ruxolitinib. The purpose of this study is to find out if the study drug, ruxolitinib, in combination with standard HR B-ALL treatment is safe and effective in children, adolescents, and young adults with HR B-ALL. Participants can expect to be in this study for the treatment period of approximately 26 months (females) or 38 months (males) plus the post-treatment follow-up. Subjects are considered on study during the post-treatment follow-up period until the subject is deceased, lost to follow-up, or until the study is completed. Subjects in this study will be followed until all enrolled subjects have been followed for 3 years from Day 1 or are deceased or lost to follow-up.

The purpose of this study is to evaluate the efficacy of the medication N-acetylcysteine (NAC) to help young people with alcohol use disorder. NAC is an over-the-counter supplement and antioxidant that has been approved by the Food and Drug Administration (FDA) in adults and children for other uses, but has not been approved by the FDA for treatment of alcohol use disorder. All participants will receive brief alcohol counseling during the 8 weeks of medication treatment. Volunteers ages 13-25 are needed for this study.

Early intervention for infants and toddlers with or at-risk for autism spectrum disorder can promote developmental skills and improve lifelong outcomes. Yet, many children with ASD are not diagnosed until after age 3. In order to improve early detection of ASD, we are investigating very early predictors of social communication challenges in infants as young as 1 week to 6 months of age.

This research study examines how the development of attention and motor skills in the first year of life is associated with the emergence of social and communication skills in three groups of infants: infants who are first born or who have a sibling with no developmental delays, infants who have an older sibling diagnosed with autism spectrum disorder, and infants who were born preterm.

This study is for patients that have been diagnosed with one of the following types of cancer: Ewing sarcoma, rhabdomyosarcoma, non-rhabdomyosarcoma soft tissue sarcomas, osteosarcoma, Wilms tumor or another rare tumor. The investigational drug used in this study is called cabozantinib, also known as XL184. The purpose of this study is to determine the response rate of XL184 in children and young adults. Participants in this clinical trial are expected to receive treatment for up to 5 years or until they develop side effects or the tumor worsens. Follow-up exams will be given at 30 days, 6 months and possibly yearly after study treatment completion.