WASHINGTON — Sen. Arlen Specter completed his last round of chemotherapy on Monday and said he planned to celebrate with a martini and dinner with friends.

The 78-year-old Republican from Pennsylvania traveled to Washington on Monday after receiving the 12th and final dose at a Philadelphia hospital. He worked all day, as he has throughout the three months of treatment.

Specter described the treatments as "tough but tolerable." He said at times he was left feeling tired and lethargic.

The senator learned in April he had an early recurrence of Hodgkin's disease, which is a cancer of the lymphatic system.