Justice Ruth Bader Ginsburg on Friday said she has been undergoing chemotherapy for cancerous lesions on her liver.

The 87-year-old justice, in a statement released by the U.S. Supreme Court public information office, said her chemotherapy treatment started May 19. A periodic scan in February, followed by a biopsy, revealed the liver lesions.

"Immunotherapy first essayed proved unsuccessful," the justice said in her statement. "The chemotherapy course, however, is yielding positive results. Satisfied that my treatment course is now clear, I am providing this information."

Ginsburg's most recent scan July 7, she said, showed a significant reduction of the lesions and no new disease.

"I am tolerating chemotherapy well and am encouraged by the success of my current treatment," she said. "I will continue bi-weekly chemotherapy to keep my cancer at bay, and am able to maintain an active daily routine. Throughout, I have kept up with opinion writing and all other court work."

Her recent hospitalizations were unrelated to the cancer recurrence, she said. Ginsburg was released just this week from the Johns Hopkins Hospital after treatment for an infection. She underwent an endoscopic procedure in the afternoon to clean out a bile duct stent that was placed last August.

In May, she entered that hospital for treatment for acute cholecystitis, a benign gallbladder condition. While there, she participated in the court's historic virus-era telephonic arguments from her hospital bed.

Ginsburg has been treated in the past for lung, early-stage pancreatic and colon cancer. Last November, Ginsburg was briefly hospitalized after experiencing fever and chills. Her symptoms then abated with intravenous antibiotics and fluids.

"I have often said I would remain a member of the court as long as I can do the job full steam," Ginsburg said Friday. "I remain fully able to do that."