| NEC | Neuroendocrine carcinomas |
|---|---|
| NEC | Neuroendocrine cell |
| PNEC | Pulmonary neuroendocrine cell |
| WDNC | Well-differentiated neuroendocrine carcinoma |
| primitive neuroectodermal tumours | A type of brain tumour. Prenatal diagnosis: diagnosis before birth. Methods for prenatal diagnosis include ultrasound (of the uterus, placenta and developing foetus), chorionic villus sampling to obtain tissue for chromosome or biochemical analysis, amniocentesis to obtain amniotic fluid for the analysis of chromosmes, enzymes, DNA, etc. A growing number of birth defects and diseases are now amenable to prenatal diagnosis. Also called antenatal diagnosis. (12 Dec 1998) |
|---|---|
| nerve sheath tumours | Tumours arising in the sheath surrounding the axon of some nerve cells and formed by the plasma membrane of schwann cells in the peripheral nervous sytem and by oligodendrocytes in the central nervous system. Neurofibromas and neurilemmomas are the most commonly occurring tumours of this type. (12 Dec 1998) |
| neuroectodermal tumours | Malignant neoplasms arising in the neuroectoderm, the portion of the ectoderm of the early embryo that gives rise to the central and peripheral nervous systems, including some glial cells. (12 Dec 1998) |
| desmoplastic tumours | <radiology> Carcinoid of small bowel or colon, Hodgkin's lymphoma, scirrhous gastric carcinoma (12 Dec 1998) |
| developmental brain tumours | <radiology> 1% of all brain tumours, germ-cell tumours, epidermoid more than dermoid more than > Teratoma, usually midline, craniopharyngioma, colloid cyst, lipoma, hamartoma (12 Dec 1998) |
| duodenal tumours | <radiology> 90% benign, in 2nd and 3rd portion: 50% malignant, in 4th portion: most malignant, of malignancies: 80-90% leading to adenocarcinoma Differential diagnosis: benign, tubular adenoma, leiomyoma, lipoma, hamartoma (Peutz-Jeghers), prolapsed antral polyp, Brunner's gland adenoma (really hypertrophy and hyperplasia), malignant, adenocarcinoma (80-90% of malignant lesions), villous adenoma (pre-malignant), carcinoid / isleT-cell tumour (12 Dec 1998) |
| infantile brain tumours | <radiology> Can be present at birth: choroid plexus papilloma, medulloblastoma, craniopharyngioma, ependymoma, astrocytoma, teratoma (12 Dec 1998) |
| odontogenic tumours | Neoplasms produced from tooth-forming tissues. (12 Dec 1998) |
| ovarian stromal tumours | <radiology> Age 20 - 50 yrs, 20% of all ovarian tumours, fibroma / fibrosarcoma, granulosa-theca cell tumour, with or without oestrogens most likely to be precocious puberty, endometrial hyperplasia/carcinoma, fibrocystic breast disease, Sertoli-Leydig cell tumour, aka: arrhenoblastoma, with or without androgens most likely to be masculinization, may be mixed type (12 Dec 1998) |
| ovarian tumours | <radiology> Before age 45 most likely to be 98% benign, 2/3 of cancers in ages 40 - 65 yrs see also: ovarian stromal tumours (12 Dec 1998) |
| lymphatic vessel tumours | Neoplasms composed of lymphoid tissue, a lattice work of reticular tissue the interspaces of which contain lymphocytes. The concept does not refer to neoplasms located in lymphatic vessels. (12 Dec 1998) |