OUTLINE: This is a dose escalation study. Patients receive gadolinium texaphyrin IV over 5-10 minutes 4 times weekly at least 2 hours prior to external beam radiotherapy over 2.5 weeks (total of 10 fractions). Cohorts of 3-6 patients are treated at escalating doses of gadolinium texaphyrin. The maximum tolerated dose is defined as the highest dose level in which dose limiting toxicity occurs in no more than 2 of 6 patients. Patients are followed once monthly for 2 months.