LDS Church President Ezra Taft Benson remained in serious but stable condition Tuesday morning after undergoing surgery for the second time in four days to remove a blood clot from the left side of his brain, an LDS Hospital nursing supervisor said.

The 91-year-old church leader first underwent surgery Wednesday after a CT scan showed fluid collecting on both sides of his brain. The blood clots, 1 to 2 centimeters thick, were pressing on President Benson's brain, causing severe headaches and making it difficult for him to swallow.LDS Hospital neurosurgeon Bruce F. Sorensen, who performed the Wednesday operation to remove two subdural hematomas (fluid collections), said at a news conference after the first operation that he was concerned about possible new clots.

Sunday afternoon, LDS Hospital staff observed symptoms of recurrence, and at 2:30 p.m., surgeons re-drained the clot on the left side of President Benson's head.

President Benson's condition, first reported Monday as critical but stable, was upgraded early in the day to serious but stable.