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.
Lesions on the liver are general anomalies in the tissue structure of the liver, notes WebMD. A hemangioma is a benign mass of anomalous blood vessels that is the most common cause of lesions on the liver, according to the American Liver Foundation and the California Pacific Medical Center. The second most commonly detected form of benign mass is a focal nodular hyperplasia, a tumor that does not require any treatment, explains the American Liver Foundation. Other causes of lesions on the liver include cystic conditions such as simple non-infectious cysts and polycystic liver disease, explains the California Pacific Medical Center.