PATIENT CHARACTERISTICS: Age: 18 to 80 Performance status: Karnofsky 70-100% ECOG 0-2 Life expectancy: At least 3 months Hematopoietic: WBC at least 3,000/mm3 Granulocyte count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 2 mg/dL SGOT no greater than 2.0 times upper limit of normal (ULN) Renal: Creatinine no greater than ULN Other: No severe anorexia, nausea, or vomiting No concurrent significant medical complications that would preclude compliance Not pregnant Fertile patients must use effective contraception during and for 3 months after study No allergy to 90Y-hMN-14