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[Sigmoid colon cancer with multiple liver metastasis (H3) effectively treated with CPT-11 and DSM (degradable starch microsphere) HAI therapy and intensive high dosage 5-FU HAI therapy--a case report].

A weekly HAI therapy (CPT-11 80 mg, MMC 4 mg, degradable starch microsphere (DSM) 600 mg) was given to a patient with sigmoid colon cancer and multiple liver metastasis (H3) who had been taking tegafur 300 mg/day and 5-FU 750 mg HAI/week, which resulted in PD. This therapy was carried out on an outpatient basis with minimum side effects (< grade 2). After 8 weeks, the tumor marker dropped to one tenth and the liver metastasis decreased in size (PR). The time courses of the concentrations of CPT-11, SN-38 and SN-38G were determined by drawing blood after HAI with or without DSM. The Cmax and AUC inf. of SN-38 at HAI without DSM were 17 ng/ml and 90.55 ng/h/ml, respectively, which was comparable to that at i.v. administration. The Cmax and AUC inf. of SN-38 at HAI with DSM were 12 ng/ml and 129.19 ng/h/ml, respectively, implying that DSM might have an enhancing effect on CPT-11 due to stasis of the hepatic artery that slows the conversion of CPT-11 to SN-38 resulting in a longer existence of SN-38.