Erstwhile UFC star Anderson Silva’s comeback is on shaky ground, as evidenced by the fact that he spent the night in the hospital due to back issues. As per GloboTV’s sports site Combate (and translated via Google Translate to English):

Anderson Silva has lived a drama in the late morning on Monday. After a workout at the gym jiu-jitsu XGym, in Rio de Janeiro, the fighter felt severe back pain when trying to stand up and fell to the ground. Crying in pain, Spider despaired even more to see that I was not feeling my legs, which lasted a few minutes. He was placed on a stretcher and transported to the Barra D’Or Hospital, where he was evaluated by a specialist in spine, orthopedic Sergio Gurgel. Former UFC champion underwent MRI, CT scans and blood tests, and none of them pointed something serious about your health. The diagnosis was lumbago (pain in the lumbar region) acute, and Anderson was discharged on Tuesday morning after spending the night under medical care in case. He is well, and it was all a big scare.

Silva is scheduled to face Nick Diaz at UFC 183, and it will be his first fight back since losing to Chris Weidman at UFC 168 via horrifically shattered leg.