#vasculitis

• Angiitis — A medical condition characterized by the inflammation of the wall of a blood vessel (artery, vein, or capillary) or lymphatic vessel, being a variant spelling and clinical synonym of the more common term 'angiitis' or 'vasculitis'. This structural pathology can be triggered by autoimmune processes, infections, or allergic reactions, leading to the narrowing of the vascular lumen, ischemia of the served tissues, and functional impairment of vital organs.
• Angionecrosis — A destructive structural pathological process consisting of necrosis, cell death, and disintegration of the walls of a blood vessel (artery or vein). This severe clinical phenomenon, often triggered by necrotizing vasculitis, virulent bacterial infections, direct toxic injuries, or well-defined prolonged ischemia, leads to a total loss of vascular lumen integrity, causing spontaneous massive hemorrhages or secondary occlusive thromboses.
• Arteritis — An acute or chronic inflammatory condition of the arterial walls, structurally caused by autoimmune processes, infections, or toxic factors, clinically manifested by the narrowing of the vascular lumen and reduction of blood supply to organs. The most well-known forms include giant cell arteritis (temporal arteritis) and Takayasu's arteritis, both requiring prompt diagnosis to prevent severe ischemic complications such as blindness or strokes.