The idea that assessment is intrinsic to effective instruction is traced from early experiments in the individualization of learning through the work of Benjamin Bloom to reviews of the impact of feedback on learners in classrooms.
Incidental hypervascular lesions are also very common findings in liver imaging. It is important to differentiate between 'touch' and 'don't touch' lesions. Benign 'don't touch' hypervascular tumors include hemangioma, FNH and small adenomas.
Intravascular hemolysis occurs very rarely and is usually the result of a transfusion reaction or hemolytic anemia. Extravascular hemolysis is quite common and means that the red blood cell is damaged as part of an external process, usually the venipuncture process used to obtain the specimen.