| DNA excision | <molecular biology> The removal of a damaged segment of a DNA molecule by a group of DNA repair enzymes in order to repair the molecule. (09 Oct 1997) |
|---|---|
| tRNA excision ligase | <enzyme> Processes pre-trna-tyr into mature trna-tyr Registry number: EC 6.5.1.- (26 Jun 1999) |
| excision | <surgery> To surgically remove. To excise tissue. (27 Sep 1997) |
| excision biopsy | Excision of tissue for gross and microscopic examination in such a manner that the entire lesion is removed. (05 Mar 2000) |
| excision repair | <molecular biology> Mechanism for the repair of environmental damage to one strand of DNA (loss of purines due to thermal fluctuations, formation of pyrimidine dimers by UV irradiation). The site of damage is recognised, excised by an endonuclease, the correct sequence is copied from the complementary strand by a polymerase and the ends of this correct sequence are joined to the rest of the strand by a ligase. The term is sometimes restricted to bacterial systems where the polymerase also acts as endonuclease. (11 Nov 1997) |
| loop electrocautery excision procedure | Electrocautery excisional biopsy of abnormal cervical tissue. (05 Mar 2000) |
| loop excision | A diagnostic and therapeutic gynecological surgical technique for removing dysplastic cells from the cervix. In this office procedure conducted with the aid of colposcopy, a small wire loop is used to excise visible patches of cervical intraepithelial neoplasia. Like cauterization, cryosurgery, and CO2 laser procedures, loop excision can be done with local anaesthetic, and is an uncomplicated, relatively inexpensive way of removing dysplastic cells; in addition, it provides material for biopsy. It is not advised for cases of severe dysplasia or carcinoma in situ, which are better addressed by cervical conization, an inpatient procedure. Synonym: loop resection. (05 Mar 2000) |
| lymph node excision | Surgical excision of one or more lymph nodes. Its most common use is in cancer surgery. (12 Dec 1998) |
| acid radical | A radical formed from an acid by loss of one or more hydrogen ions; e.g., SO4-, NO3-. (05 Mar 2000) |
| radical | 1. <chemistry> An atom or or electrically neutral group that has one or more unpaired electrons. 2. <botany> Of leaves, clustered at the base of the stem. (09 Oct 1997) |
| radical cystectomy | Surgery to remove the bladder as well as nearby tissues and organs. (12 Dec 1998) |
| radical, free | In biochemistry, it is a group of atoms bonded together into an entity that is extremely reactive and shortlived. (a free radical is not a political extremist on parole.) (12 Dec 1998) |
| radical hysterectomy | Complete removal of the uterus, upper vagina, and parametrium. (05 Mar 2000) |
| radical mastectomy | <procedure, surgery> The surgical removal of the breast, part of the underlying pectoralmuscle and some or all of the lymph nodes under the armpit. (09 Oct 1997) |
| radical mastectomy, modified | Breast cancer treatment involving removal of the breast, lymph nodes (the glands ) in the armpit and associated skin and subcutaneous tissue. It differs from total radical mastectomy in that the pectoral (chest) muscles are preserved. (12 Dec 1998) |