ABSCESS: Localized collection of pus ADHESION: scar tissue joining two surfaces or structures. Usually refers to bowel, but can apply to joints, meninges, etc. AGENESIS: failure of formation of a body part ANEURYSM: abnormal dilatation of an artery ASCITES: accumulation of fluid in peritoneal cavity ATRESIA: structure which should be hollow remains solid CARBUNCLE: multiloculated subcutaneous abscess, usually due to staphy infection CIRRHOSIS: hardening, usually of liver, with nodular hyperplasia CYST: epithelial lined sac containing fluid DEGENERATION: degenerative changes of cells short of necrosis DIVERTICULUM: pouch or pocket leading from a main cavity or tube EMBOLUS: non-dissolvable material transferred from one part of the circulation to another. Can arise in arterial, venous or lymphatic vessels EMPYEMA: pus in an anatomical space, e.g. pleural cavity FECALITH: intestinal concretion formed around or from feces FISTULA: abnormal granulating tract connecting two epithelial lined surfaces HARMATOMA: tumor-like collection of excess tissue or abnormally situated tissue formed during development HERNIA: abnormal protusion of part or all of a viscus through a weakening of the body cavity wall that usually contains it. ICTERUS: Jaundice INFARCTION: necrosis of tissue due to ischaemia INTUSSUSCEPTION: telescoping of one portion of the bowel into another JAUNDICE: yellow appearance of skin, mucosa and conjuctivaes, and all organs, due to excess bilirubin in serum or organs KELOID: a thick scar resulting from excessive growth of fibrous tissue and occurring especially after burns or radiation injury KYPHOSIS: hunchback; dorsal curvature of spine METAPLASIA: replacement of one type of cell in tissue by another NECROSIS: death of cells in an organ or tissue NEOPLASIA: process of new growth or tumor formation OBSTRUCTION: something that impedes or blocks a flow PAPILLARY: projecting from a surface PARESIS: slight or partial paralysis (i.e. focal limb weakness) PERFORATION: the creation of a hole in an organ, tissue or tube POLYP: growth protruding from mucosal membrane that extends into a cavity PUS: liquid material containing living and dead bacteria, leucocytes and tissue debris in a serous exudate PYEMIA: septicemia with pus in blood and secondary sites of suppuration REGENERATION: renewal of lost tissue or parts REPAIR: restoration of continuity after injury SCAR: remnants or residuum of the healing process SINUS: blind-ending tract lined with granulation tissue and opening onto an epithelial surface STENOSIS: narrowing of a duct, canal or channel or a natural passage THROMBUS: clot formed in a blood vessel or tissue space during life ULCER: lack of surface epithelium on a mucous or cutaneous surface, usually accompanied by inflammation VARIX: focally dilated vein VOLVULUS: intestinal obstruction due to twisting of bowel on its mesentry WOUND HEALING: restoration of continuity after wounding