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.
Focal Nodular Hyperplasia (FNH) is the second most common benign lesion of the liver. It is usually asymptomatic and has no malignant potential or risk of rupture. Symptomatic lesions are usually larger and cause compression of adjacent structures.