[Thermo-chemotherapy using low-dose CPT-11 in a patient with local recurrence of rectal cancer]

We report a case of pelvic recurrence of advanced rectal carcinoma, presenting a favorable response with a low dose (25 mg/m2) of CPT-11 (Irinotecan) combined with topical hyperthermia for relapse after treatment with 4 cycles of high-dose (100 mg/m2) CPT-11 chemotherapy alone. This combination therapy was safely carried out on an outpatient basis. The degrees of recovery of the left lower limb pain and edema, and of serum CEA reduction were comparable to those in high-dose chemotherapy alone. No significant adverse effects were encountered in the thermo-chemotherapy attempted. Since hyperthermic treatment enhances the cytotoxic effects of CPT-11 in vitro, topical hyperthermia with low-dose CPT-11 therapy may produce a response comparable to that in high-dose CPT-11 chemotherapy alone. However, an optimal dose and comparative study with other chemotherapeutic agents would be needed. This regimen may be advantageous in the maintenance of quality of life for the palliation of postoperative pelvic recurrence since this treatment can be performed on an outpatient basis.