The Rolling Stones have issued a statement on Mick Jagger's surgery, without saying exactly what it was for.
"Mick Jagger has successfully undergone treatment. He is doing very well and is expected to make a full recovery."
And Jagger tweets, "Thank you everyone for all your messages of support. I’m feeling much better now and on the mend - and also a huge thank you to all the hospital staff for doing a superb job."
He reportedly had a heart valve replaced, with Billboard saying, "Doctors were able to access his heart valve through his femoral artery and are now monitoring him for any complications that could arise from the procedure, including excess bleeding. The minimally invasive procedure allows Jagger to avoid major surgery -- doctors are able to repair the heart valve using a a catheter that accesses a major artery without opening the chest."
Last Saturday, The Stones announced that they had to postpone their No Filter tour due to Jagger's need for "medical treatment." It is expected to be rescheduled for July and August.