| paraganglioma, extra-adrenal | A relatively rare, usually benign neoplasm originating in the chemoreceptor tissue of the carotid body, glomus jugulare, and aortic bodies. It consists histologically of rounded or ovoid hyperchromatic cells that tend to be grouped in an alveolus-like pattern within a scant to moderate amount of fibrous stroma and a few large thin-walled vascular channels. They are uncommon before the age of 20, with a female predominance in some series. (12 Dec 1998) |
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| extra | 1. Something in addition to what is due, expected, or customary; something in addition to the regular charge or compensation, or for which an additional charge is made; as, at European hotels lights are extras. 2. <prefix> Without, outside of. Source: Websters Dictionary (21 Jun 2000) |
| extra-abdominal desmoid | A deep-seated firm tumour, most frequently occurring on the shoulders, chest, or back of young men or women, consisting of collagenous fibrous tissue that infiltrates surrounding muscle; frequently recurs but does not metastasize. (05 Mar 2000) |
| extra-anatomic bypass | A vascular bypass that does not conform to the preexisting anatomy. (05 Mar 2000) |
| extra-articular | <anatomy> Situated outside of a joint. Source: Websters Dictionary (01 Mar 1998) |
| extra-axial | Off the axis; applied to intracerebral lesions that do not arise from the brain itself. (05 Mar 2000) |
| extra-floral | Of nectaries, not within the flower. (09 Oct 1997) |
| extra nodal lymphoma | <oncology, tumour> Literally outside the lymph nodes, but exhibiting the characteristics of lymph node cancer. A term used to describe the extent and site of disease. (27 Sep 1997) |
| extra-ocular muscle disease | <radiology> Graves disease, pseudotumour, lymphoma, metastasis, infection, carotid-cavernous fistula, granulomatous disease (12 Dec 1998) |
| anaplastic large cell lymphoma | <tumour> A form of lymphoma characterised by anaplasia of cells, sinusoidal growth, and immunoreactivity with CD30 (Ki-1 or Ber-H2). Synonym: Ki-1+ lymphoma. (05 Mar 2000) |
| bilateral large kidneys | <radiology> Autosomal dominant (adult) polycystic disease, lymphoma Cf: other urographic patterns (12 Dec 1998) |
| carcinoma, large cell | A tumour of undifferentiated (anaplastic) cells of large size. It is usually bronchogenic. (12 Dec 1998) |
| papillary adenoma of large intestine | <tumour> Appears as a solitary sessile, often large, tumour of colonic mucosa composed of mucinous epithelium covering delicate vascular projections; malignant change occurs frequently; hypersecretion occurs rarely. Also known as adenoma. Synonym: papillary adenoma of large intestine. (05 Mar 2000) |
| ribulose-1,5-bisphosphate carboxylase-oxygenase large subunit epsilonN-methyltransferase | <enzyme> An aspect of EC 2.1.1.43; trimethylates lys-14 of rubisco Registry number: EC 2.1.1.- Synonym: rubisco lsmt, rubisco large subunit lysine n-methyltransferase (26 Jun 1999) |
| the large mass of the telencephalon | On either side of the midline, consisting of the cerebral cortex and its associated fibre systems, together with the deeper-lying subcortical telencephalic nuclei (i.e., basal ganglia [nuclei]). (05 Mar 2000) |