A Baltimore woman is suing the Johns Hopkins Health System, saying her arms and legs were amputated after doctors failed to diagnose an infection in her uterus. Joyce Ferguson, 59, filed the lawsuit last week in Baltimore City Circuit Court. The lawsuit, which seeks unspecified damages, alleges that Ferguson went to the emergency room at Howard County General Hospital three times with severe pelvic pain.During her third visit in March 2012, Ferguson was about to be discharged when she was found lying on a stretcher, incoherent and cold to the touch, according to the lawsuit.