#vessel wall

• Angiomalacia — A structural pathological process characterized by the softening, loss of consistency, and degeneration of the wall of a blood vessel (artery or vein). This rare clinical phenomenon, caused by degenerative diseases, severe inflammatory processes (such as necrotizing vasculitis), or local ischemic necrosis, weakens the structural resistance of the vascular lumen, exposing the patient to major risks of aneurysmal dilation, sudden rupture, and massive hemorrhages.
• 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.
• Angioplegia — A sudden, temporary, or permanent paralysis of the smooth muscle fibers within blood vessel walls, causing a total loss of vascular tone and uncontrolled generalized or localized vasodilation. This structural pathological phenomenon, caused by severe lesions of the vegetative nervous system, extremely powerful toxins, or well-defined anaphylactic shocks, severely disrupts hemodynamics and circulatory autoregulation, leading to the collapse of blood pressure.
• Angiorrhea — A continuous pathological discharge of fluid, plasma, or lymph from the lumen of structurally degraded or excessively permeable blood vessels or lymphatic vessels. In clinical and histopathological contexts, this well-defined exudation or transudation phenomenon often occurs in severe inflammatory states, endotoxic endothelial injuries, or advanced chronic lymphedemas, leading to fluid accumulation in interstitial tissues.
• Angiorrhexis — A sudden, spontaneous, or traumatic rupture of a blood vessel wall (artery or vein), followed by a massive hemorrhage into the surrounding tissues or body cavities. This clinical structural phenomenon occurs most often on the background of pre-existing parietal fragility caused by an aneurysmal dilation, a tumorous ulcerative process, or a well-defined necrotic inflammation, constituting a major medical emergency.