However, another doctor said that Ms. Trump would probably stay longer in hospital because of her position. "That's because she's the First Lady," Dr. Jeffrey Cadeddu, Professor of Urology and Radiology, Southwestern Medical Center, University of Texas, Dallas. "If you were, you'd be in and out one day, I promise."
Still, embolization kills some surrounding healthy kidney tissue, which causes swelling and pain in a patient, so a longer stay could be helpful or necessary, doctors said.
The White House did not explain what led Mrs. Trump to seek treatment, or whether the "benign condition of the kidney" meant she had a benign tumor or something else. Specialists said it could be that doctors were monitoring a show for a while and decided to act now because it had grown. Or they said she may have symptoms like blood in the urine or back pain or stomach pain.
Dr. Joseph A. Vassalotti, Chief Medical Officer of the National Kidney Foundation, said he suspected that Mrs. Trump had either a benign tumor, an angiomyolipoma, or a bleeding cyst. "It sounds like a benign tumor," he said.
Dr. David G. Warnock, an emeritus professor of medicine at the University of Alabama in Birmingham and former president of the Kidney Foundation, said doctors often perform embolization when a biopsy or other diagnostic procedure causes bleeding.
"My list of benign conditions that would embolize you is quite short," he said. "Ninety percent of them should stop bleeding after a procedure like kidney biopsy."
But Dr. Joseph V. Bonventre, chief of the kidney department at Brigham and Women's Hospital in Boston, said that it was unlikely that Mrs. Trump would have had a biopsy on this type of tumor and that doctors probably have decided to embolize the procedure to prevent a benign tumor from growing by starving it of blood and thus starving oxygen.