Supreme Court Justice Ruth Bader Ginsburg was treated Tuesday for a gallstone that was causing an infection, the court said in a statement.

She underwent nonsurgical treatment for a benign gallbladder condition at Johns Hopkins Hospital in Baltimore. The condition was detected Monday after the court’s historic telephone session for oral arguments. Tests confirmed that a gallstone had migrated to her cystic duct, causing a blockage and infection.

Read the rest of the story at NBC News.