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.
Seborrheic keratoses may be the most common benign tumor of the skin. Typically, they are scaly (hyperkeratotic), brown (hyperpigmented), often somewhat greasy plaques that vary in size and thickness and often appear to be stuck onto the skin surface (Fig. 1).They occur on any surface except the palms, soles, and mucosa.evi are common benign growths, usually hyperpigmented or skin-colored macules, papules, or small plaques, probably derived from proliferating altered melanocytes (nevus cells). Age, race, and genetic and environmental factors (primarily sun exposure) all contribute to the development of nevi for any particular patient.