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.
Hypervascular tumors can be effectively treated with embolization â a procedure to block blood flow to a tumor. Sometimes a tumor will begin to shrink after its blood supply has been cut off. This may make it easier for surgeons to remove the tumor. Even if the tumor is inoperable, however, embolization may stop or slow the tumor's growth, thus improving a patient's quality of life.