<prompt> All of the following conditions are associated with coombs positive hemolytic anemia, except:Thrombotic Thrombocytopenic purpura TTPSclerodermaSLEPAN  <response>: Thrombotic Thrombocytopenic purpura TTP, shows coombs negative microangiopathic hemolytic anemia. Ref: Amit Ghosh, MD 2010, Chapter 11, Hematology: Benign Hematology, In the book, Mayo Clinic Internal Medicine Board Review, 9th Edition, New york, Page 378; Harrisons Principles of Internal Medicine, 16th Edition, Page 612 