<prompt> Medial calcification is seen in -AtherosclerosisArteriolosclerosisMonckebergs sclerosisDissecting aneurysm  <response>: First, see types of arteriesBased on their size and structural features, arteries are divided into three types.1. Large or Elastic arteriesAortaIts large branches, eg. - Innominate, Subclavian, common carotid, iliac.Pulmonary arteries.2. Medium sized or muscular arteriesSmall branches of aorta Coronary, Renal3. Small arteries and arteriolesWithin substance of the tissue Now see their affection -ArteriosclerosisDont get confused with atherosclerosis.Arteriosclerosis means hardening of arteries by thickening and loss of elasticity of arterial wall.There are three patterns of arteriosclerosis.1. AtherosclerosisCharacterized by intimal lesions, i.e. atheromas, which project into a vascular lumen and may obstruct it.This is the most common pattern of arteriosclerosis.It involves elastic arteries and large medium size muscular arteries.2. ArteriolosclerosisSeen in arterioles of patients with hypertension and diabetes.Two anatomic variants are common hyaline and hyperplastic arteriolosclerosis.3. Monckeberg medial calcific sclerosisIt is seen in small and medium-sized muscular arteries.It is a degenerative and apparently non-inflammatory disease.Media of these arteries becomes calcified.It occurs in patients older than 50 years. 