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.
Vascular lesions are comprised of blood vessels that have formed in an abnormal pattern directly underneath the surface of the skin. This usually results in a red or purple lesion since the blood vessels can be visible through the skin. These lesions occur in many sizes, shapes and forms all over the body.