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.
Figure 1. Top panel: Pathologic specimen from a patient with biopsy proven giant cell arteritis. Multi-nucleated giant cells (arrow) are present in the vessel wall. Bottom panel: Higher power view. Photograph courtesy of Ben Glasgow, M.D. Pathophysiology. The most common ocular manifestation of GCA is visual loss, most commonly secondary to AAION.