In this observational study researcher want to learn more about the effectiveness of drug
VITRAKVI (generic name: larotrectinib) and how well the drug is tolerated during routine use
in patients with TRK fusion cancer which is locally advanced or spread from the place where
it started to other places in the body. TRK fusion cancer is a term used to describe a
variety of common and rare cancers that are caused by a change to the NTRK (Neurotrophic
Tyrosine Kinase) gene called a fusion. During this fusion, an NTRK gene joins together, or
fuses, with a different gene. This joining results in the activation of certain proteins (TRK
fusion proteins), which can cause cancer cells to multiply and form a tumor. VITRAKVI is an
approved drug that blocks the action of the NTRK gene fusion. This study will enroll adult
and paediatric patients suffering from a solid tumor with NTRK gene fusion for whom the
decision to treat their disease with VITRAKVI has been made by their treating physicians.
During the study, patients' medical information such as treatment information with VITRAKVI,
other medication or treatments, changes in disease status and other health signs and symptoms
will be collected within the normal medical care by the treating doctor. Participants will be
observed over a period from 24 to 60 months.

This trial studies health outcomes after treatment in patients with retinoblastoma. Gathering health information over time from patients and family members through vision assessments, samples of tissue and saliva, and questionnaires may help doctors learn more about what causes retinoblastoma, identify long-term health outcomes for patients with retinoblastoma, and find out which therapies may be the best for treating retinoblastoma.

This phase II trial tests whether treosulfan, fludarabine, and rabbit antithymocyte globulin (rATG) work when given before a blood or bone marrow transplant (conditioning regimen) to cause fewer complications for patients with bone marrow failure diseases. Chemotherapy drugs, such as treosulfan, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Fludarabine may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. rATG is used to decrease the body's immune response and may improve bone marrow function and increase blood cell counts. Adding treosulfan to a conditioning regimen with fludarabine and rATG may result in patients having less severe complications after a blood or bone marrow transplant.