Medial calcification is seen in -

First, see types of arteries Based on their size and structural features, arteries are divided into three types. 1. Large or Elastic arteries Aorta Its large branches, eg. - Innominate, Subclavian, common carotid, iliac. Pulmonary arteries. 2. Medium sized or muscular arteries Small branches of aorta → Coronary, Renal 3. Small arteries and arterioles Within substance of the tissue          Now see their affection - Arteriosclerosis Don’t 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. Atherosclerosis Characterized 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. Arteriolosclerosis Seen in arterioles of patients with hypertension and diabetes. Two anatomic variants are common hyaline and hyperplastic arteriolosclerosis. 3. Monckeberg medial calcific sclerosis It 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.