[Endoscopic local injection of anticancer drugs bound to carbon particles for treatment of upper digestive tract cancers--clinical trials].

: A new dosage formulation consisting of anticancer drugs bound to carbon particles was developed for treating cancers of the upper digestive tract, and is designed to distribute higher levels of anticancer drug to the regional lymph nodes and at the injection site, as compared to a drug in aqueous solution form. Thirteen patients with histologically proven carcinoma (8 with superficial esophageal cancer and 5 with early or proper muscle layer-infiltrating gastric cancer), in whom surgical treatment was contraindicated, received intra- and peritumoral injection of the new dosage formulation (total dose of 35-100 mg of peplomycin or 250-500 mg of methotrexate) guided by esophago- or gastro-fiberscope. Eleven of these 13 patients are currently alive, 12-64 months after therapy, or they died without evidence of recurrence 12-98 months after the treatment. One patient has remained cancer-free for 37 months after a second course of the therapy given to treat a recurrence found 26 months after the first treatment. Another patient has a recurrent tumor 9 months after the therapy and is now going to undergo a second course of treatment. Side effects were not severe and well-tolerable.