Vinblastine, Celecoxib, and Combination Chemotherapy in Treating Patients With Newly-Diagnosed Metastatic Ewing's Sarcoma Family of Tumors

DISEASE CHARACTERISTICS: * Newly diagnosed Ewing's sarcoma family of tumors of the bone or soft tissues * Paraspinal tumors of extra-dural origin and Askin's tumor of the chest wall are eligible * Metastatic disease, defined by the following criteria: * Lesions are discontinuous from the primary tumor, are not regional lymph nodes, and do not share a body cavity with the primary tumor * A single pulmonary or pleural nodule greater than 1 cm OR multiple nodules greater than 0.5 cm are considered evidence of pulmonary or pleural metastases (unless there is another clear medical explanation for these lesions) * Contralateral pleural effusions are considered metastatic disease * No CNS involvement PATIENT CHARACTERISTICS: Age * 50 and under (at diagnosis) Performance status * Lansky 50-100% (under 17 years of age) * Karnofsky 50-100% (age 17 and over) * Patients whose performance status is affected by a pathological fracture are allowed provided they are able to undergo treatment Life expectancy * Not specified Hematopoietic * Not specified Hepatic * Bilirubin no greater than 1.5 times upper limit of normal (ULN) * AST or ALT less than 5 times ULN Renal * Creatinine adjusted according to age as follows\*: * No greater than 0.4 mg/dL (≤ 5 months) * No greater than 0.5 mg/dL (6 months -11 months) * No greater than 0.6 mg/dL (1 year-23 months) * No greater than 0.8 mg/dL (2 years-5 years) * No greater than 1.0 mg/dL (6 years-9 years) * No grea…