This clinical trial is focused on studying certain types of cancer in children, specifically those that are positive for ALK, ROS1, or MET genes. The cancers being studied include Neuroblastoma, Rhabdomyosarcoma, Anaplastic Large Cell Lymphoma, Inflammatory Myofibroblastic Tumors, and other related malignancies. The treatment being tested is a medication called Crizotinib, which may be used alone or in combination with another drug called Temsirolimus. Crizotinib is also known by its code name PF-02341066 and is available in different forms, such as capsules and oral solutions.
The purpose of this study is to find the best dose of Crizotinib when used with Temsirolimus and to assess the safety and initial effectiveness of Crizotinib on its own in treating these specific gene-positive tumors. Participants in the study will receive either Crizotinib alone or in combination with Temsirolimus, depending on their specific cancer type and genetic markers. The study will monitor how the body responds to the treatment and any side effects that may occur.
Throughout the study, participants will undergo regular check-ups and tests to track their progress and the impact of the treatment on their cancer. The study aims to gather important information that could help improve treatment options for children with these types of cancers in the future. Some participants may receive a placebo, which is a substance with no active medication, to compare the effects of the actual treatment. The study is expected to continue until the end of 2029.



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