WASHINGTON (AP) Justice Ruth Bader Ginsburg is back at work at a public session of the Supreme Court, 18 days after undergoing surgery for pancreatic cancer.

Ginsburg entered the marble courtroom with her eight male colleagues just after 10 o'clock Monday morning as Supreme Court Marshal Pamela Talkin began the traditional chant that announces the start of court: "Oyez. Oyez. Oyez "

Ginsburg was in her typical court dress consisting of a black robe and white lace collar. She took her seat between Justices David Souter and Samuel Alito.

Doctors gave Ginsburg, 75, an encouraging prognosis after they removed a small malignant tumor from her pancreas and determined that the disease had not spread to her lymph nodes or other organs.

She underwent surgery at Memorial Sloan-Kettering Cancer Center in New York on Feb. 5 and returned to her home in Washington on Feb. 13. The day after her operation, Ginsburg said through a court spokeswoman that she intended to be in court for Monday's session.

Copyright 2009 The Associated Press.