<br>        DISEASE CHARACTERISTICS:<br><br>          -  Histologically or cytologically proven progressive advanced solid tumor that is not<br>             amenable to standard therapy (i.e., resistant to standard therapy or for which no<br>             standard therapy exists)<br><br>          -  No clinically symptomatic CNS involvement<br><br>        PATIENT CHARACTERISTICS:<br><br>        Age:<br><br>          -  18 and over<br><br>        Performance status:<br><br>          -  ECOG 0-2<br><br>        Life expectancy:<br><br>          -  At least 3 months<br><br>        Hematopoietic:<br><br>          -  WBC at least 3,000/mm^3<br><br>          -  Neutrophil count at least 1,500/mm^3<br><br>          -  Platelet count at least 100,000/mm^3<br><br>        Hepatic:<br><br>          -  Bilirubin no greater than 1.5 times upper limit of normal (ULN)<br><br>          -  AST and ALT less than 2 times ULN (5 times ULN if liver metastases present)<br><br>          -  Alkaline phosphatase less than 2 times ULN (5 times ULN if liver metastases present)<br><br>        Renal:<br><br>          -  Creatinine less than 1.4 mg/dL<br><br>        Cardiovascular:<br><br>          -  No ECG abnormalities of clinical relevance<br><br>        Other:<br><br>          -  No severe or unstable systemic disease or infection<br><br>          -  No circumstances (e.g., alcoholism or substance abuse) that would preclude study<br><br>          -  HIV negative<br><br>          -  Not pregnant or nursing<br><br>          -  Negative pregnancy test<br><br>          -  Fertile patients must use effective contraception<br><br>        PRIOR CONCURRENT THERAPY:<br><br>        Biologic therapy:<br><br>          -  At least 4 weeks since prior immunostimulating substances (e.g., biologic response<br>             modifiers or colony-stimulating factors)<br><br>          -  No concurrent immunostimulating substances (e.g., biologic response modifiers or<br>             colony-stimulating factors (except in life-threatening situations))<br><br>        Chemotherapy:<br><br>          -  At least 4 weeks since prior chemotherapy<br><br>        Endocrine therapy:<br><br>          -  At least 4 weeks since prior systemic steroids<br><br>          -  At least 4 weeks since prior hormonal therapy<br><br>          -  No concurrent systemic steroids<br><br>        Radiotherapy:<br><br>          -  At least 4 weeks since prior radiotherapy<br><br>          -  No concurrent radiotherapy<br><br>        Surgery:<br><br>          -  Not specified<br><br>        Other:<br><br>          -  No prior mistletoe preparations<br><br>          -  At least 4 weeks since prior investigational treatment<br><br>          -  No other concurrent anticancer agents<br><br>          -  No other concurrent investigational therapy<br>