Prime Minister Ariel Sharon underwent a minor procedure Wednesday to have fluid removed from his stomach after a CT scan uncovered the problem, the hospital where he's being treated said. The prime minister has been hospitalized since Jan. 4 when he suffered a massive stroke that left him in a coma. Sharon remained in stable but serious condition Wednesday, Jerusalem's Hadassah Hospital said in a statement. The procedure was the first since Sharon, 77, underwent emergency abdominal surgery Feb. 11 after an abdominal scan revealed dead tissue in his digestive system. Doctors removed 20 inches, or one-third, of his large intestine during that surgery. Since suffering his massive stroke, Sharon, 77, has been comatose and hooked up to a breathing tube. A feeding tube was inserted into his stomach on Feb. 1.