| modified radical mastectomy | <procedure, surgery> The most common type of mastectomy. Breast skin, nipple, areola and underarm lymph nodes are removed. The chest muscles are saved. (09 Oct 1997) |
|---|---|
| colour radical | The part of a visibly coloured molecule responsible for light absorption over a range of wavelengths thus giving rise to the colour. By extension the term may be applied to UV or IR absorbing parts of molecules. Do not confuse with chromatophores. (18 Nov 1997) |
| hydroxyl radical | <chemical> Hydroxyl. The univalent radical oh. This radical is characteristic of hydroxides, oxygen acids, alcohols, glycols, phenols, and hemiacetals. Chemical name: Hydroxyl (12 Dec 1998) |
| oxygen radical | <chemistry> Any oxygen species that carries an unpaired electron (except free oxygen). Examples are the hydroxyl radical and the superoxide anion. These radicals are very powerful oxidizing agents and cause structural damage to proteins and nucleic acids. They mediate the damaging effects of ionising radiation. (18 Nov 1997) |
| extended radical mastectomy | Excision of the entire breast including the nipple, areola, and overlying skin, as well as the pectoral muscles and the lymphatic-bearing tissues of the axilla and chest wall and internal mammary chain of lymph nodes. (05 Mar 2000) |
| free radical | A chemically active atom or molecular fragment containing a chemical charge due to an excess or deficient number of electrons. Radicals seek to receive or release electrons in order to achieve a more stable configuration, a process that can damage the large molecules within cells. See: Oxidation. (09 Oct 1997) |
| free radical reductase | <enzyme> Catalyses conversion of carbon-centreed lipid radicals into an inactive species by utilizing vitamin e at one end and glutathione at the other Registry number: EC 1.8.4.- (26 Jun 1999) |
| free radical scavengers | Substances that influence the course of a chemical reaction by ready combination with free radicals. Among other effects, this combining activity protects pancreatic islets against damage by cytokines and prevents myocardial and pulmonary perfusion injuries. (12 Dec 1998) |
| abdominal hernia | <surgery> A hernia protruding through a defect or weakened portion of the abdominal wall. An umbilical hernia is an example of a type of abdominal hernia. (27 Sep 1997) |
| Barth's hernia | A loop of intestine between a persistent vitelline duct and the abdominal wall. (05 Mar 2000) |
| Beclard's hernia | A hernia through the opening for the saphenous vein. (05 Mar 2000) |
| bilocular femoral hernia | A femoral hernia with two sacs, the first being in the femoral canal, and the second passing through a defect in the superficial fascia and appearing immediately beneath the skin. Synonym: bilocular femoral hernia, Hey's hernia. (05 Mar 2000) |
| Bochdalek's hernia | Absence of the pleuroperitoneal membrane (usually on the left) or an enlarged Morgagni's foramen which allows protrusion of abdominal viscera into the chest. Synonym: Bochdalek's hernia. (05 Mar 2000) |
| caecal hernia | A hernia containing caecum. (05 Mar 2000) |
| Malgaigne's hernia | Infantile inguinal hernia prior to the descent of the testis. (05 Mar 2000) |