Mom is back in the Critical Care Unit, for observation.
Yesterday they announced a mass on her lung and a possible ruptured appendix instead of the infected diverticulitis. They did a CAT scan and drained either the appendix or the abscess (infection).
The results of the CAT scan were that, instead of a mass, she has a 'bubble' on an artery, a.k.a. an aneurysm. They said that the aneurysm may be dissected, which would be very bad: It would be releasing blood into the thoracic cavity. And, of course, it could burst. Hence, they are observing.