Ben Roethlisberger indeed suffered a concussion in Sunday's game and remains in the concussion protocol.
Roethlisberger self-reported the concussion.
"We will lean on the expert advice of our medical staff," Mike Tomlin said.
Earlier Tuesday, Roethlisberger said he underwent concussion testing at the team's facility after suffering a traumatic ocular migraine.
Roethlisberger said he believes he's concussion free during his weekly radio appearance, but that was before receiving the results of his Impact concussion test.