| medullary carcinoma | <tumour> A malignant neoplasm, comparatively soft and brainlike in consistency, that consists chiefly of neoplastic epithelial cells, with only a scant amount of fibrous stroma. (05 Mar 2000) |
|---|---|
| melanotic carcinoma | <tumour> Obsolete term for melanoma. (05 Mar 2000) |
| meningeal carcinoma | <tumour> An infiltration of carcinoma cells in the arachnoid and subarachnoid space; may be primary or secondary. Synonym: leptomeningeal carcinoma, leptomeningeal carcinomatosis, meningeal carcinomatosis. (05 Mar 2000) |
| mesometanephric carcinoma | A rare tumour of the female genital tract, most often the ovary, formerly considered to be derived from mesonephric rests. Two varieties are recognised: (1) clear cell carcinoma, so called because of its histologic resemblance to renal cell carcinoma, and now considered to be of muellerian duct derivation and (2) an embryonal tumour (called also endodermal sinus tumour and yolk sac tumour), occurring chiefly in children. The latter variety may also arise in the testis. (12 Dec 1998) |
| metaplastic carcinoma | <tumour> A carcinoma in which some of the tumour cells are spindle shaped, suggesting a sarcoma, or in which the stroma shows foci of bone or cartilage; such carcinoma's occur in the upper respiratory or alimentary tract or in the breast. (05 Mar 2000) |
| metastatic carcinoma | <tumour> A carcinoma that has appeared in a region remote from its site of origin, as in metastasis. Synonym: secondary carcinoma. (05 Mar 2000) |
| metatypical carcinoma | <tumour> Obsolete term for basosquamous carcinoma. (05 Mar 2000) |
| microinvasive carcinoma | <tumour> A variety of carcinoma seen most frequently in the uterine cervix, in which carcinoma in situ of squamous epithelium, on the surface or replacing the lining of glands, is accompanied by small collections of abnormal epithelial cells that infiltrate a very short distance into the stroma; this may represent the earliest stage of invasion, in which the neoplastic cells are capable of intrusion but not of sustained growth in connective tissue. (05 Mar 2000) |
| clear cell carcinoma of kidney | <radiology> Hypernephroma, renal cell carcinoma, arises from proximal collecting tubule, 10% bilateral adenocarcinoma types: papillary, alveolar, onchocytoma vascularity, 85% hypervascular (require pre-op embolization), 10% hypovascular (usually papillary type), 5% avascular associated with: tuberous sclerosis, von Hippel-Lindau syndrome see also: staging (12 Dec 1998) |
| Walker carcinoma | <tumour> A transplantable carcinosarcoma of the rat that originally appeared spontaneously in the mammary gland of a pregnant albino rat, and which now resembles a carcinoma in young transplants and a sarcoma in older transplants. Synonym: Walker carcinoma. (05 Mar 2000) |
| colloid carcinoma | <tumour> A variety of adenocarcinoma in which the neoplastic cells secrete conspicuous quantities of mucin, and, as a result, the neoplasms are likely to be glistening, sticky, and gelatinoid in consistency. Synonym: colloid cancer, colloid carcinoma. (05 Mar 2000) |
| colon carcinoma | <radiology> Risk factors: colonic adenoma, 93% of colorectal CA arises from adenomatous polyps, 5% of adenomas 5mm in size develop into carcinoma, family history and polyposis syndromes, chronic ulcerative colitis, prominent lymphoid follicular pattern, history of endometrial and breast carcinoma, metastasis: liver (25%); retroperitoneal/mesenteric nodes (15%); hydronephrosis (13%); adrenal (10%); ovary; psoas muscle; ascites, risk of: 1% for synchronous colon carcinoma, 3% for metachronous colon CA, 3.8% for extracolonic malignancy, Dukes A: bowel wall; B: serosa/mesentery; C: lymph nodes; D: metastasis (12 Dec 1998) |
| mucinous carcinoma | <tumour> A variety of adenocarcinoma in which the neoplastic cells secrete conspicuous quantities of mucin, and, as a result, the neoplasms are likely to be glistening, sticky, and gelatinoid in consistency. Synonym: colloid cancer, colloid carcinoma. (05 Mar 2000) |
| mucoepidermoid carcinoma | <tumour> Most commonly a salivary gland carcinoma of low grade malignancy in children, but with variable malignancy in adults; composed of mucous, epidermoid, and intermediate cells, with mucous cells abundant only in low grade carcinoma's; recurrence is frequent, and high grade carcinoma's metastasize to cervical nodes. Synonym: mucoepidermoid tumour. (05 Mar 2000) |
| wolffian duct carcinoma | A rare tumour of the female genital tract, most often the ovary, formerly considered to be derived from mesonephric rests. Two varieties are recognised: (1) clear cell carcinoma, so called because of its histologic resemblance to renal cell carcinoma, and now considered to be of muellerian duct derivation and (2) an embryonal tumour (called also endodermal sinus tumour and yolk sac tumour), occurring chiefly in children. The latter variety may also arise in the testis. (12 Dec 1998) |