HOUSTON—Dr. Martin Kenneth Rinjipur, a neurosurgeon at Methodist Hospital, was heckled from the observation deck Monday after removing a cancerous tumor from a patient's occipital lobe. "You call that closing an incision?" the unidentified man shouted. "I could make a cleaner suture with 15 centimeters of frayed chromic gut and a pair of barbecue tongs. Go back to Johns Hopkins." Rinjipur did his best to act like he had not heard the comments.