| ISW | interstitial water |
|---|---|
| IT | immunological test; immunotherapy; implantation test; individual therapy; information technology; in... |
| ITE | insufficient therapeutic effect; in the ear [hearing aid]; in-training examination; intrapulmonary i... |
| ITH | interstitial hyperthermia |
| LIP | lipase; lipocortin; lithium-induced polydipsia; lymphoid interstitial pneumonitis |
Ni
| squamous odontogenic tumour | A benign epithelial odontogenic tumour thought to arise from the epithelial cell rests of Malassez; appears clinically as a radiolucent lesion closely associated with the tooth root and histologically as islands of squamous epithelium enclosed by a peripheral layer of flattened cells. (05 Mar 2000) |
|---|---|
| Nelson tumour | A pituitary tumour causing the symptoms of Nelson syndrome. (05 Mar 2000) |
| neuroectodermal tumour, melanotic | A benign, rapidly growing, deeply pigmented tumour of the jaw and occasionally of other sites, consisting of an infiltrating mass of cells arranged in an alveolar pattern, and occurring almost exclusively in infants. Its source of origin is in dispute, the various theories giving rise to its several names. (12 Dec 1998) |
| neuroectodermal tumour, peripheral | A heterogeneous group of malignant neoplasms arising in either supportive structures or neuronal tissue. They occur in adolescents and young adults. This tumour shares a number of characteristics with ewing's sarcoma: it is highly cellular and consists of a monotonous pattern of primitive-appearing round cells. The chest wall is the most common site but the trunk, abdomen, and pelvis are other primary sites. (12 Dec 1998) |
| neuroectodermal tumour, primitive | A malignant brain tumour sharing common features and biologic properties with medulloblastoma. Some pathologists and clinicians use the terms interchangeably: they both can disseminate throughout the nervous system and, in some cases, systemically. most lesions arise from the posterior fossa in children under five years of age. The tumour often produces hydrocephalus and symptoms of increased intracranial pressure. Papilledema is often present. (12 Dec 1998) |
| sugar tumour | A benign clear cell tumour of the lung containing abundant glycogen. (05 Mar 2000) |
| debulking of tumour | <surgery> The surgical removal of as much of a tumour as is possible, although the surgeon is unable to remove the whole thing. (09 Oct 1997) |
| superior pulmonary sulcus tumour | <oncology, tumour> Tumour originating from the superior sulcus of the lung that invades all or a portion of the brachial plexus. (16 Dec 1997) |
| dermal duct tumour | A benign small tumour derived from the intradermal part of eccrine sweat gland ducts occurring often on the head and neck. (05 Mar 2000) |
| dermoid / epidermoid tumour | <radiology> Intracranial pearly tumour, congenital ectodermal tumour, stratified squamous capsule secretes cholestrine and desquamated cells, site: petrous apex / cerebellopontine angle (most common), suprasellar cistern (parasellar mass), cerebral hemisphere, cerebellum / 4th ventricle, CT: low density (due to fat content); occasionally high density, no enhancement, extra-axial (12 Dec 1998) |
| dermoid tumour | A collection of cancerous cells which form cysts that contain one or more of the three primary embryonic germ layers: skin, hair or teeth. (27 Sep 1997) |
| desmoid tumour | <anatomy> Resembling, or having the characteristics of, a ligament; ligamentous. Origin: Gr. Desmos ligament. Source: Websters Dictionary (01 Mar 1998) |
| DNA tumour virus | <oncology, virology> Virus with DNA genome that can cause tumours in animals. Examples are Papovaviridae, Adenoviridae and Epstein Barr virus. (18 Nov 1997) |
| DNA tumour viruses | DNA viruses producing malignant tumours. Of the six major groupings of DNA viruses four contain members which are actually or potentially oncogenic: the adenoviridae, the herpesviridae, the papovaviridae, and the poxviridae. (12 Dec 1998) |
| dysembryoplastic neuroepithelial tumour | A rare low grade neoplasm most frequently seen in children and associated with seizures and cortical dysplasia; the often multinodular, multicystic tumour is comprised of an oligodendroglial-like background with accompanying neurons. (05 Mar 2000) |