The statement also said she "looks forward to a full recovery so she can continue her work on behalf of children everywhere". The president spoke with Mrs. Trump before the procedure and with her doctor afterward, the first lady's office said.
The White House said she is expected to remain at Walter Reed National Military Medical Center for the rest of the week. It seems that the White House did a good job at keeping this piece of information private, as people like Paolo Zampolli, UN ambassador and friend of Melania, heard about the information along with the rest of the world through the media, according to People.
Melania Trump is Trump's third wife. "Thank you to all of the well-wishers!" he wrote in a tweet.
And while President Trump is only just on his way to visit his wife in hospital now, we can't help but wonder: what exactly did Melania have done - and what can we take from this?
The treatment of choice for the condition is through embolization, which involves cutting off the blood supply to the abnormal growth so it would shrink and eventually die off. It described the operation as an "embolization procedure" to treat the kidney condition.
Urologists say the most likely explanation for the procedure is a kind of noncancerous kidney tumor called an angiomyolipoma, which isn't common but tends to occur in middle-aged women. But if it is larger, or has many blood vessels feeding it, they might choose the embolization procedure or even surgery, he said. Or they said it could be that she experienced symptoms of some sort, like noticing blood in the urine or experiencing back pain or stomach pain.
The White House did not elaborate on the condition of the first lady or on the procedure. Grisham, who has visited the first lady, later told CBS that the first lady is "doing very well" and is in "good spirits".