Patient description: A 3-day-old Asian female infant presents with jaundice that started a day ago. She was born at 38w3d of gestation, after an uncomplicated pregnancy. The family history is unremarkable. The baby is breastfed. Vital signs are reported as: axillary temperature: 36.3°C, heart rate: 154 beats/min, respiratory rate: 37 breaths/min, and blood pressure: 65/33 mm Hg. Her weight is 3.2 kg, length is 53 cm, and head circumference 36 cm. Her sclera are yellow and her body is icteric. No murmurs or any other abnormalities are detected in the heart and lung auscultation. Her liver and spleen are normal on palpation. Laboratory results are as follows: Serum total bilirubin: 21.02 mg/dL Direct bilirubin of 2.04 mg/dL AST: 37 U/L ALT: 20 U/L GGT: 745 U/L Alkaline phosphatase: 531 U/L Creatinine: 0.3 mg/dL Urea: 29 mg/dL Na: 147 mEq/L K: 4.5 mEq/L CRP: 3 mg/L Complete blood cell count within the normal range. She is diagnosed with uncomplicated neonatal jaundice that may require phototherapy.

Clinical trial eligibility criteria: eligible ages (years): 1.0-18.0,  Solid Tumours Key Subjects must be at least 1 and less than or equal to 18 years of age at the time of study entry Patients must have had histologic verification of one of the malignancies listed below at original diagnosis or at relapse a) Rhabdomyosarcoma, b) Non-rhabdomyosarcomatous Soft Tissue Sarcoma (including desmoplastic small round cell tumor), c) Ewing Sarcoma / Peripheral Primitive Neuroectodermal Tumor (PNET), d) Osteosarcoma, e) Neuroblastoma (Measurable), f) Neuroblastoma (Evaluable), g) Hepatoblastoma Patient must have disease that has either relapsed or is refractory to prior therap Patients who will be receiving the tablet formulation must have a body surface area (BSA) >= 0.84 m^2 (square meter) at baseline Patients must have radiographically measurable disease (with the exception of neuroblastoma), Measurable disease is defined as the presence of at least one lesion on magnetic resonance imaging (MRI) or computed tomography (CT) scan that can be accurately measured with the longest diameter a minimum of 10 mm in at least one dimension (CT scan slice thickness no greater than 5 mm) Patients with neuroblastoma who do not have measurable disease but have iodine-131 - meta-iodobenzylguanidine positive (MIBG+) evaluable disease are eligible Patients must have a Lansky or Karnofsky performance status score of >= 50, corresponding to Eastern Cooperative Oncology Group (ECOG) categories 0, 1 or 2. Use Karnofsky for subjects >= 16 years of age and Lansky for subjects <= 16 years of age Patients must have fully recovered from the acute toxic effects of all prior chemotherapy, immunotherapy, or radiotherapy prior to entering this study  Pregnant or breast-feeding women are not eligible for this study due to risks of fetal and teratogenic adverse events as seen in animal/human studies. Negative pregnancy tests must be obtained in girls who are post-menarchal. Males or females of reproductive potential may not participate unless they have agreed to use an effective contraceptive method beginning at the signing of the informed consent until at least 2 weeks after the last dose of the study drug. The definition of adequate contraception will be based on the judgment of the principal investigator or a designated associate. Study drug may also potentially be secreted in milk and therefore breastfeeding women are excluded. Males (including those who have had vasectomies) with partners who can become pregnant will need to use birth control while on this study, as will their partner. Men are advised to use condoms during sexual intercourse while on study drug and continue to use adequate contraception for at least 2 weeks after the last dose of protocol therapy Patients requiring corticosteroids who have not been on a stable or decreasing dose of corticosteroid for the 7 days prior to enrollment are not eligible Patients who are currently receiving another investigational drug are not eligible Patients who are currently receiving other anti-cancer agents or radiation therapy are not eligible Patients who are currently receiving more than one anti-hypertensive medication (Grade 3) or whose blood pressure is not well controlled are not eligible for study enrollment Patients must not be on therapeutic anticoagulation (Warfarin [coumadin] and/or low molecular weight heparin are prohibited). Prophylactic anticoagulation (i.e. intraluminal heparin) of venous or arterial access devices is allowed Patients receiving drugs with a known risk of torsades de pointes are not eligible Patients who require thyroid replacement therapy are not eligible if they have not been receiving a stable replacement dose for at least 4 weeks prior to study enrollment Patients who are unable to swallow tablets or liquid are not eligible Patients who have an uncontrolled infection are not eligible